{"id":4007,"date":"2025-02-24T15:58:34","date_gmt":"2025-02-24T15:58:34","guid":{"rendered":"https:\/\/www.warmy.io\/blog\/ssl-and-tls-certificate-errors-in-email-servers-how-they-impact-deliverability\/"},"modified":"2025-02-24T15:58:34","modified_gmt":"2025-02-24T15:58:34","slug":"ssl-and-tls-certificate-errors-in-email-servers-how-they-impact-deliverability","status":"publish","type":"post","link":"https:\/\/www.warmy.io\/blog\/ssl-and-tls-certificate-errors-in-email-servers-how-they-impact-deliverability\/","title":{"rendered":"SSL &amp; TLS Certificate Errors in Email Servers: Deliverability impact"},"content":{"rendered":"<p><span>What if you were to send an important email\u2014a\u2002client proposal, let\u2019s say, or a security update, or internal memo\u2014and it was rejected, marked as spam, or even intercepted?<\/span><\/p>\n<p><span>That\u2019s where SSL\/TLS encryption comes in. These protocols secure email traffic through data encryption and confirmation of the authenticity of mail servers. But SSL\/TLS encryption doesn\u2019t work if the certificates are misconfigured.<\/span><\/p>\n<p><span>Expired certificates, mismatches, or weak encryption protocols can cause mail delivery failures, reduce sender trust, and even expose emails to attackers.<\/span><\/p>\n<h2><b>Understanding SSL &amp; TLS in email security<\/b><\/h2>\n<p><span>Emails, without\u2002encryption, are subject to eavesdropping, modification, or even phishing. SSL SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols that protect the\u2002transfer of emails while passing through the internet.\u00a0<\/span><\/p>\n<h3>What is SSL\/TLS?<\/h3>\n<p><span>SSL and TLS are\u2002protocols that secure the message communication between email clients (Outlook, Thunderbird etc) and mail servers. This means sensitive information\u2014like\u2002login credentials, financial information and private messages\u2014is safeguarded from being viewed by anyone else without your consent.\u00a0<\/span><\/p>\n<ul>\n<li><span>TLS is the successor of SSL<\/span><\/li>\n<li><span>TLS 1.2 TLS 1.3 are the current security standards<\/span><\/li>\n<li><span>Older versions (SSL 3.0, TLS 1.0 and\u2002TLS 1.1) are now deprecated\u00a0<\/span><\/li>\n<\/ul>\n<p><span>Because secure email delivery plays a key role in the services provided by email providers and ISPs may require TLS encryption during email exchange.<\/span><\/p>\n<h3>How does SSL\/TLS encryption secure email communication?<\/h3>\n<ul>\n<li><b>Confidentiality:<\/b><span> Ensures that no unauthorized third parties can intercept and read your emails.\u00a0<\/span><\/li>\n<li><b>Authentication:<\/b><span> Ensures that the correct mail server is communicating\u2002with the correct sender and receiver\u00a0<\/span><\/li>\n<li><b>Data integrity:<\/b><span> Prevents the content of email from being modified during transit.<\/span><\/li>\n<li><b>Compliance: <\/b><span>Several\u2002regulations (like <\/span><a href=\"https:\/\/gdpr-info.eu\/\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\"><span>GDPR<\/span><\/a><span>, HIPAA, and CCPA) require encryption to protect sensitive email information.<\/span><\/li>\n<\/ul>\n<p><span>For example, if you email from an account user@example.com through SMTP, your email client will send an SMTP connection\u2002to mail. example. com. To avoid interception of the\u2002login credentials by hackers or manipulation of the content of the message, this connection, which is further secured with SSL\/TLS, is encrypted.<\/span><\/p>\n<h3>What is the TLS handshake?<\/h3>\n<p><span>When sending\u2002an email, the mail transfer agents between the sending and receiving mail servers will execute a TLS handshake to create a secure channel. Here\u2019s what happens:<\/span><\/p>\n<ol>\n<li><span>The sending mail server contacts the receiving mail server over SMTP.<\/span><\/li>\n<li><span>The receiving mail server offers a TLS certificate.<\/span><\/li>\n<li><span>The sending mail server checks if the certificate is valid and trusted.<\/span><\/li>\n<li><span>If verification succeeds, an encrypted connection is established, and the email is securely delivered.<\/span><\/li>\n<\/ol>\n<p><b>Now, when the SSL\/TLS handshake fails, the following scenarios can happen:<\/b><\/p>\n<ul>\n<li><span>If a server doesn\u2019t support encryption, that email will be delivered in plain text and sensitive data can be captured<\/span><\/li>\n<li><span>If the certificate is out of date or self-signed or untrusted, the email server may refuse to accept the email altogether.<\/span><\/li>\n<li><span>Some providers will flag non-TLS connections as spam, reducing inbox placement rates.<\/span><\/li>\n<\/ul>\n<p><span>Spam filters today look for SSL\/TLS\u2002compliance as an indicator of email trustworthiness. Inadequate encryption from the server can\u2002lead to security flags for emails, resulting in poor deliverability. <\/span><b>Common consequences of SSL\/TLS misconfigurations include:\u00a0<\/b><\/p>\n<ul>\n<li><b>Emails marked as spam. <\/b><span>Unencrypted or misconfigured servers increase the risk of landing in spam folders.<\/span><\/li>\n<li><b>Email rejection (<\/b><a href=\"https:\/\/www.warmy.io\/blog\/email-error-550-high-probability-of-spam-causes-and-solutions\" target=\"_blank\" rel=\"noopener noreferrer\"><b>SMTP 550 errors<\/b><\/a><b>)<\/b><span>. Some mail servers outright reject emails without proper TLS encryption.<\/span><\/li>\n<li><b>Insecure connection warnings.<\/b><span> Clients like Gmail and Outlook display warnings when an email is sent from a non-TLS server.<\/span><\/li>\n<li><b>Data exposure risks.<\/b><span> Without encryption, sensitive data can be intercepted during transmission.<\/span><\/li>\n<\/ul>\n<h2><b>Common SSL\/TLS certificate errors in email servers<\/b><\/h2>\n<h3>1. Expired or invalid certificate<\/h3>\n<p><span>Every certificate has a forced expiration date, and if it is not renewed before that expiration date, then the server will refuse encrypted email connections. When this happens, email clients such as Outlook, Gmail, or Thunderbird give users a warning regarding an expired certificate.<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The certificate\u2019s expiration date was missed.<\/span><\/li>\n<li><span>Auto-renewal failed due to misconfigured settings.<\/span><\/li>\n<li><span>The server is still using an old or revoked certificate.<\/span><\/li>\n<\/ul>\n<h3>2. Self-signed certificate errors<\/h3>\n<p><span>Unlike a conventional certificate signed by a trusted Certificate Authority (CA),\u2002a self-signed certificate is its own trusted identifier. It can encrypt email traffic, but email clients and servers won\u2019t trust it by default, causing errors.<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The server is using a self-generated certificate instead of one from a CA.<\/span><\/li>\n<li><span>The certificate isn\u2019t installed in the trusted certificate store on client devices.<\/span><\/li>\n<\/ul>\n<h3>3. Certificate name mismatch<\/h3>\n<p><span>Certificate mismatch errors prevent users from sending and receiving emails. This is because clients and servers refuse to establish secure connections if the hostname doesn\u2019t match.\u00a0<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The SSL\/TLS certificate was issued for <\/span><span>example.com<\/span><span>, but the mail server uses <\/span><span>mail.example.com<\/span><span>.<\/span><\/li>\n<li><span>The certificate does not include wildcards (<\/span><span>*.example.com<\/span><span>) or alternative hostnames.<\/span><\/li>\n<li><span>The mail client is configured to connect to an IP address instead of a domain name.<\/span><\/li>\n<\/ul>\n<h3>4. Certificate not trusted by client<\/h3>\n<p><span>This error means the email client does not recognize the SSL\/TLS certificate because it\u2019s issued by an unknown or untrusted CA. When this occurs, clients reject connections, resulting in failed email sending\/receiving.\u00a0<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The CA is not recognized or included in the client\u2019s certificate trust store.<\/span><\/li>\n<li><span>Missing intermediate certificates prevent proper certificate validation.<\/span><\/li>\n<\/ul>\n<h3>5. Weak or unsupported encryption protocols<\/h3>\n<p><span>The mail server is using outdated or insecure TLS versions that are no longer supported. Email providers like Google and Microsoft reject connections using outdated TLS versions\u2014many security compliance frameworks require TLS 1.2 or 1.3 for encryption.<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The server still supports TLS 1.0 or TLS 1.1, which are deprecated.<\/span><\/li>\n<li><span>The mail client requires TLS 1.2 or higher for security compliance.<\/span><\/li>\n<\/ul>\n<h3>6. Incomplete certificate chain<\/h3>\n<p><span>The certificate chain is missing intermediate certificates, making it unverifiable by clients. Email clients reject SSL\/TLS connections if they can\u2019t verify the certificate chain. Untrusted certificates trigger security warnings, making users cautious.\u00a0<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The root and intermediate certificates weren\u2019t installed correctly.<\/span><\/li>\n<li><span>The CA requires a specific chain of trust, but only the end certificate was installed.<\/span><\/li>\n<\/ul>\n<h3>7. Revoked or blacklisted certificate<\/h3>\n<p><span>When the SSL\/TLS certificate has been revoked by the CA, it becomes invalid. Mail servers may refuse connections from revoked certificates, and mail servers may also refuse connections from revoked certificates.<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The CA revoked the certificate due to security issues or a compromised private key.<\/span><\/li>\n<li><span>The domain was flagged for suspicious activity, leading to certificate revocation.<\/span><\/li>\n<\/ul>\n<h3>8. Inactive certificate<\/h3>\n<p><span>This error means the certificate is installed but not being used by the mail server. Clients may also still see security warnings even after renewal.\u00a0<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>The mail server is still using an old certificate instead of the new one.<\/span><\/li>\n<li><span>The server wasn\u2019t restarted after installing the new certificate.<\/span><\/li>\n<\/ul>\n<h3>9. Outdated security protocol<\/h3>\n<p><span>The server uses weak security settings, exposing emails to attacks. Some email providers reject weak encryption settings, thus resulting in an error.<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>Weak cipher suites (e.g., RC4, 3DES) are still enabled.<\/span><\/li>\n<li><span>Outdated cryptographic settings make the connection insecure.<\/span><\/li>\n<\/ul>\n<h3>10. Outdated encryption algorithm<\/h3>\n<p><span>Insecure hash algorithm used by the\u2002certificate such as SHA-1 or MD5 is susceptible to attacks. If the certificate of your email server still uses these obsolete encryption algorithms, email clients and security systems may reject or flag your emails due to security concerns.<\/span><\/p>\n<p><b>Why it happens:<\/b><\/p>\n<ul>\n<li><span>SSL\/TLS certificate was issued years back in SHA-1 or MD5, and has never been\u2002updated\u00a0<\/span><\/li>\n<\/ul>\n<h2><b>How to troubleshoot and fix SSL\/TLS certificate errors<\/b><\/h2>\n<h3>1. Check SSL\/TLS certificates on your email server<\/h3>\n<p><span>Before fixing SSL\/TLS issues, you need to diagnose the problem. Verifying encryption settings and checking the status of the certificate will\u2002help identify misconfigurations.<\/span><\/p>\n<h4><b>Tools to verify SSL\/TLS certificates<\/b><\/h4>\n<ul>\n<li><a href=\"https:\/\/www.ssllabs.com\/ssltest\/\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\"><b>SSL Labs<\/b><\/a><span>. Gives you a\u2002comprehensive report on the SSL\/TLS setup on your server.<\/span><\/li>\n<li><b>OpenSSL<\/b><span> (<\/span><span>openssl s_client -connect mail.example.com:465 -showcerts<\/span><span>). Command-line tool\u2002to inspect certificates.<\/span><\/li>\n<li><a href=\"https:\/\/mxtoolbox.com\/\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\"><b>MXToolbox<\/b><\/a><span>. Tests SMTP, IMAP, and POP3 SSL\/TLS security settings.<\/span><\/li>\n<\/ul>\n<h4><b>How to check expiration dates and trust chain<\/b><\/h4>\n<ul>\n<li><span>Run the following OpenSSL command to retrieve certificate details:<\/span><\/li>\n<\/ul>\n<p><span>openssl s_client -connect mail.example.com:465 -servername mail.example.com | openssl x509 -noout -dates<\/span><\/p>\n<ul>\n<li><span>It will show\u2002certificate expiration date, issuer details, and chain of trust. If the certificate is expired, self-signed, or you are\u2002missing intermediate certificates, you will need to take corrective action.<\/span><\/li>\n<\/ul>\n<h3>2. Fix certificate expiry issues<\/h3>\n<p><span>An expired certificate prevents secure email transmission. Setting up <\/span><b>automatic renewal<\/b><span> or manually replacing an expired certificate will restore proper functionality.<\/span><\/p>\n<h4><b>How to set up auto-renewals with <\/b><a href=\"https:\/\/letsencrypt.org\/\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\"><b>Let\u2019s Encrypt<\/b><\/a><\/h4>\n<p><span>Let\u2019s Encrypt provides <\/span><b>free SSL\/TLS certificates<\/b><span> with built-in renewal automation using Certbot. To set up automatic renewal:<\/span><\/p>\n<ul>\n<li><b>Install Certbot<\/b><span> on your email server:<\/span><\/li>\n<\/ul>\n<p><span>sudo apt install certbot<\/span><\/p>\n<ul>\n<li><b>Request a certificate<\/b><span> for your mail server domain:<\/span><\/li>\n<\/ul>\n<p><span>sudo certbot certonly \u2013standalone -d mail.example.com<\/span><\/p>\n<ul>\n<li><b>Enable auto-renewal<\/b><span>:<\/span><\/li>\n<\/ul>\n<p><span>sudo certbot renew \u2013dry-run<\/span><\/p>\n<p><span>This ensures your certificate <\/span><b>renews automatically before expiration<\/b><span>.<\/span><\/p>\n<h4><b>Manually renewing and reissuing certificates<\/b><\/h4>\n<p><span>In case, you are using a paid SSL certificate from CA (DigiCert, GlobalSign, etc.), follow these steps to\u2002manually reissue the certificate:\u00a0<\/span><\/p>\n<ul>\n<li><span>Log into your CA\u2019s portal and generate a new CSR (Certificate Signing Request).<\/span><\/li>\n<li><span>Upload the new certificate to your email server.<\/span><\/li>\n<li><span>Restart your mail server (<\/span><span>Postfix<\/span><span>, <\/span><span>Exim<\/span><span>, or <\/span><span>Microsoft Exchange<\/span><span>) to apply the changes.<\/span><\/li>\n<\/ul>\n<h3>3. Resolve self-signed certificate problems<\/h3>\n<h4><b>Generate a certificate from a trusted CA<\/b><\/h4>\n<p><span>To replace a self-signed certificate:<\/span><\/p>\n<ul>\n<li><b>Create a Certificate Signing Request (CSR):<\/b><\/li>\n<\/ul>\n<p><span>openssl req -new -newkey rsa:2048 -nodes -keyout mail.key -out mail.csr<\/span><\/p>\n<ul>\n<li><b>Submit the CSR to a CA<\/b><span> (DigiCert, Let\u2019s Encrypt, etc.).<\/span><\/li>\n<li><b>Install the issued certificate<\/b><span> and restart your mail server.<\/span><\/li>\n<\/ul>\n<h3>4. Fix hostname mismatch errors<\/h3>\n<h4><b>Verify the Common Name (CN) and Subject Alternative Name (SAN)<\/b><\/h4>\n<ul>\n<li><span>Run the following command to check the certificate details:<\/span><\/li>\n<\/ul>\n<p><span>openssl s_client -connect mail.example.com:465 | openssl x509 -text -noout | grep -E \u201cSubject|DNS\u201d<\/span><\/p>\n<ul>\n<li><span>Ensure that the CN (Common Name) or SAN (Subject Alternative Name) matches your mail server\u2019s hostname.<\/span><\/li>\n<\/ul>\n<h4><b>Correct mail server configuration<\/b><\/h4>\n<ul>\n<li><span>Update Postfix (<\/span><span>\/etc\/postfix\/main.cf<\/span><span>):<\/span><\/li>\n<\/ul>\n<p><span>smtpd_tls_cert_file=\/etc\/ssl\/certs\/mail.example.com.crt smtpd_tls_key_file=\/etc\/ssl\/private\/mail.example.com.key<\/span><\/p>\n<ul>\n<li><span>Restart Postfix:<\/span><\/li>\n<\/ul>\n<p><span>sudo systemctl restart postfix<\/span><\/p>\n<ul>\n<li><span>For <\/span><b>Microsoft Exchange<\/b><span>, update the SSL binding using PowerShell:<\/span><\/li>\n<\/ul>\n<p><span>Enable-ExchangeCertificate -Thumbprint YOUR_CERT_THUMBPRINT -Services SMTP<\/span><\/p>\n<h3>5. Update encryption protocols and ciphers<\/h3>\n<p><span>TLS 1.0 and TLS 1.1 are outdated and <\/span><b>no longer supported by major email providers<\/b><span>.<\/span><\/p>\n<h4><b>Check supported TLS versions on the email server<\/b><\/h4>\n<ul>\n<li><span>Run this OpenSSL command to check the <\/span><b>supported TLS versions<\/b><span>:<\/span><\/li>\n<\/ul>\n<p><span>openssl s_client -connect mail.example.com:465 -tls1_2<\/span><\/p>\n<ul>\n<li><span>If the connection <\/span><b>fails<\/b><span>, your server needs <\/span><b>TLS 1.2 or 1.3 enabled<\/b><span>.<\/span><\/li>\n<\/ul>\n<h4><b>How to enable TLS 1.2 and TLS 1.3 for improved Security<\/b><\/h4>\n<ul>\n<li><span>For <\/span><b>Postfix<\/b><span>, add the following to <\/span><span>\/etc\/postfix\/main.cf<\/span><span>: <\/span><span>smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1<\/span><\/li>\n<\/ul>\n<ul>\n<li><span>Restart the service:<\/span><\/li>\n<\/ul>\n<p><span>sudo systemctl restart postfix<\/span><\/p>\n<ul>\n<li><span>For <\/span><b>Microsoft Exchange<\/b><span>, enforce TLS 1.2+ using PowerShell:<\/span><\/li>\n<\/ul>\n<p><span>Set-SmtpSendConnector -Identity \u201cSend Connector\u201d -TlsAuthLevel MustEncrypt<\/span><\/p>\n<h3>6. Ensure the correct certificate chain is installed<\/h3>\n<h4><b>Check if intermediate certificates are missing<\/b><\/h4>\n<ul>\n<li><span>Run:<\/span><\/li>\n<\/ul>\n<p><span>openssl s_client -connect mail.example.com:465 -showcerts<\/span><\/p>\n<ul>\n<li><span>If the <\/span><b>intermediate CA certificate is missing<\/b><span>, install it on the server.<\/span><\/li>\n<\/ul>\n<h4><b>Steps to update the certificate bundle on your mail server<\/b><\/h4>\n<ul>\n<li><span>Download the correct <\/span><b>intermediate certificate<\/b><span> from your CA.<\/span><\/li>\n<li><span>Append it to your existing certificate:<\/span><\/li>\n<\/ul>\n<p><span>cat mail.crt intermediate.crt &gt; fullchain.crt<\/span><\/p>\n<ul>\n<li><span>Restart your mail server:<\/span><\/li>\n<\/ul>\n<p><span>sudo systemctl restart postfix<\/span><\/p>\n<h2><b>Preventing future SSL\/TLS issues<\/b><\/h2>\n<p><span>SSL\/TLS certificate errors can disrupt email security if not monitored regularly. Implementing proactive monitoring and automation ensures that your email system stays secure.<\/span><\/p>\n<ul>\n<li><span>Enable logging on your mail server to detect SSL\/TLS errors early.<\/span><\/li>\n<li><span>Monitor expiration dates and renew certificates before they expire.<\/span><\/li>\n<li><span>Test email encryption settings using tools like SSL Labs and OpenSSL.<\/span><\/li>\n<li><span>Keep TLS versions updated (disable SSL 3.0, TLS 1.0, and TLS 1.1).<\/span><\/li>\n<\/ul>\n<h3>Automate renewals and certificate validity checks<\/h3>\n<h4><b>Use Certbot for auto-renewal<\/b><\/h4>\n<p><span>Schedule an automatic certificate renewal with Certbot:<\/span><\/p>\n<p><span>echo \u201c0 0 * * 1 certbot renew \u2013quiet\u201d | sudo tee -a \/etc\/crontab<\/span><\/p>\n<p><span>This runs every Monday at midnight, ensuring your certificates are always up to date.<\/span><\/p>\n<h4><b>Set up alerts for expiring certificates<\/b><\/h4>\n<p><span>Use SSL monitoring tools to receive alerts before a certificate expires:<\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/letsencrypt.org\/docs\/certbot\/\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\"><span>Let\u2019s Monitor<\/span><\/a><span>: Sends email notifications for expiring certificates.<\/span><\/li>\n<li><span>Nagios SSL Certificate Monitor: Automatically checks SSL expiration.<\/span><\/li>\n<\/ul>\n<h2><b>How Warmy helps ensure secure and reliable email deliverability<\/b><\/h2>\n<p><span>SSL\/TLS certificate errors are just one of the dozens of factors that can affect\u2002email deliverability. Even if your email server is correctly configured with valid SSL\/TLS certificates, other deliverability issues\u2014like spam filters, poor <\/span><span>sender reputation<\/span><span>, and DNS misconfigurations\u2014can still prevent your emails from reaching inboxes. This is where<\/span><a href=\"https:\/\/www.warmy.io\/\" target=\"_blank\" rel=\"noopener noreferrer\"> <span>Warmy.io<\/span><\/a><span> comes in.<\/span><\/p>\n<h3>Strengthening sender reputation to reduce email rejections<\/h3>\n<p><span>Warmy\u2019s AI-powered email warmup ensures that your email domain builds trust with email providers, helping you reduce the likelihood of email rejection. This is done by gradually increasing email volume to prevent email providers from flagging senders as spam. Warmy also helps improve email placement rates\u2014ensuring that secure emails actually reach inboxes.<\/span><\/p>\n<h3>Comprehensive deliverability insights<\/h3>\n<p><span>Warmy\u2019s<\/span><a href=\"https:\/\/www.warmy.io\/free-tools\/email-deliverability-test\" target=\"_blank\" rel=\"noopener noreferrer\"><span> free email deliverability test<\/span><\/a><span> is gold. It checks if your emails are landing in inboxes or being tagged as spam. Warmy also shows the percentage of emails that land in respective folders across major email providers. Warmy\u2019s new Domain Health Hub, for example, takes it one level higher by providing domain-level insights. This means Warmy users can monitor their deliverability at the domain level and access a detailed breakdown of health metrics, performance reports, and deliverability trends.<\/span><\/p>\n<h3>SPF and DMARC setup assistance<\/h3>\n<p><span>Warmy offers a free<\/span><a href=\"https:\/\/www.warmy.io\/free-tools\/spf-generator\" target=\"_blank\" rel=\"noopener noreferrer\"> <span>SPF Record Generator <\/span><\/a><span>\u00a0to specify which mail servers only are authorized to send emails on behalf of a particular domain. Meanwhile, the<\/span><a href=\"https:\/\/www.warmy.io\/free-tools\/dmarc-generator\" target=\"_blank\" rel=\"noopener noreferrer\"> <span>DMARC Record Generator<\/span><\/a><span> helps prevent email spoofing and phishing by allowing domain owners to specify how their emails should be authenticated and what to do if authentication fails. Combined, these two tools verify that your domain is credible and legitimate\u2014improving deliverability.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"DMARC\" height=\"600\" src=\"https:\/\/warmy-blog-wordpress-bucket.s3.amazonaws.com\/wp-content\/uploads\/2024\/03\/11093811\/DMARC-1024x768.png\" width=\"800\" title=\"\"><\/p>\n<p><strong>SSL\/TLS is one step towards deliverability. Warmy takes you further.<\/strong><\/p>\n<p><span>A properly configured SSL\/TLS certificate ensures secure email transmission, but it\u2019s not enough to guarantee inbox placement. Email deliverability challenges remain. Warmy comes in and provides a comprehensive solution to ensure that your emails not only get sent securely but also land in the inbox where they belong.<\/span><\/p>\n<p><span>If your sender reputation is weak, your emails could still be rejected, marked as spam, or ignored. Warmy bridges this gap, ensuring that your emails are:<\/span><\/p>\n<ul>\n<li><span>Delivered with high reputation scores. Warmy builds trust with email providers, reducing spam risks.<\/span><\/li>\n<li><span>Optimized for engagement. With AI-powered warmup and template checker, Warmy keeps your email domain and actual emails in good standing.<\/span><\/li>\n<li><span>Proactively monitored. Warmy provides real-time insights into email performance, reputation, and potential issues.<\/span><\/li>\n<\/ul>\n<p><span>Using Warmy alongside a properly secured email server enables businesses to eliminate both security vulnerabilities and deliverability bottlenecks\u2014ensuring that emails are trusted, secure, and consistently reach inboxes.\u00a0<\/span><\/p>\n<p><span>Warmy ensures that every email you send is not only secure but also reaches its intended recipient. It\u2019s time to take your email deliverability to the next level. Start using Warmy today by signing up for a <\/span><a href=\"https:\/\/app.warmy.io\/signup\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\"><span>free 7-day trial<\/span><\/a><span> or <\/span><a href=\"https:\/\/www.warmy.io\/book-a-demo\" target=\"_blank\" rel=\"noopener noreferrer\"><span>booking a demo<\/span><\/a><span>.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What if you were to send an important email\u2014a\u2002client proposal, let\u2019s say, or a security update, or internal memo\u2014and it was rejected, marked as spam, or even intercepted? That\u2019s where SSL\/TLS encryption comes in. These protocols secure email traffic through data encryption and confirmation of the authenticity of mail servers. But SSL\/TLS encryption doesn\u2019t work [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[],"class_list":["post-4007","post","type-post","status-publish","format-standard","hentry","category-email-marketing"],"acf":[],"lang":"en","translations":{"en":4007},"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/posts\/4007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/comments?post=4007"}],"version-history":[{"count":0,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/posts\/4007\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/media?parent=4007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/categories?post=4007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/tags?post=4007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}