SMTP Email Error 501 5.1.3 – How to Resolve [SOLVED]
Are you trying to send an email proposal, and all of a sudden, you receive an email that states the following? “501 5.1.3 Bad recipient address syntax” or “501 5.1.3 Invalid recipient address.” Don’t worry; it is a common email error called SMTP Email Error 501 5.1.3, which often occurs when there is an issue […]
Securing Your AWeber Emails: SPF, DKIM, and DMARC Authentication
Email is still the pillar of marketing plans in the digital era since it provides direct channel of contact between companies and their consumers. But given the emergence of cybersecurity concerns, maintaining the integrity and security of these messages now takes first importance. This is where email authentication comes in handy and is rather important […]
Mailmodo deliverability: Best Practices and Tools
Email deliverability isn’t just about sending messages; it’s about strategically placing them in recipients’ primary inboxes, avoiding spam folders, and maximizing engagement. For businesses leveraging Mailmodo, like all email marketing platforms, navigating the complex landscape of deliverability is an ongoing process. Recent industry studies highlight the challenges faced by email marketers across all platforms, emphasizing […]
SMTP Connection Encryption: The Key to Secure & Reliable Email Delivery
One of the top channels of communication for businesses is email, which unfortunately makes it one of the prime targets of cyberthreats like phishing, data interception, and spoofing. Encryption is the answer. Without it, emails are transmitted as plaintext over the Internet where people can steal sensitive information. SMTP (Simple Mail Transfer Protocol) is the […]
SMTP Error 555 5.5.2 – Syntax Error: Causes & Fixes
It can feel like hitting a wall when you run into SMTP Error 555 5.5.2—and everything seems to be configured correctly. So whether or not you happen to be a developer sending emails programmatically or an IT admin managing a mail server, this error can be a clear indicator that something is amiss at the protocol […]
SMTP Error 421 4.7.27 – Connection Rate Limited: Causes & Solutions
A lot of email senders simply click ‘send’ without much thought. That’s because email has become routine—a feature of everyday life.But for email senders who rely on the channel for marketing or outreach use cases, a lot is happening behind the scenes. You write an irresistible subject line, you nail the content, and you’re ready to […]
Steps to Delist from Spamhaus XBL: A Comprehensive Guide
What is Spamhaus XBL The Spamhaus Exploits Block List (XBL) is an authoritative, real-time database that catalogs IP addresses associated with compromised computers. These computers have been exploited by unauthorized third-party entities, leading to activities such as the operation of open proxies, the propagation of worms and viruses equipped with spam distribution mechanisms, and the […]
SMTP Email Codes 200, 220, 221, and 250 – How to Resolve [SOLVED]
With several SMTP error codes and messages, many people find it challenging to determine if their email account or SMTP settings are on the right track. Today’s article will help you steer the digital email highway, providing you with SMTP (Simple Mail Transfer Protocol) success codes—2xx responses that act as traffic lights and serve as […]
Email Domain & IP Blacklist Removal: 5 Steps to Delist
Let us give you a scenario: You spend hours designing your emails. You’re excited to send out your email campaigns. Then you find out they are no longer landing in inboxes. Instead, they’re most likely being sent to the dreaded spam folder—every email marketer’s nightmare. This is a common indication that your email domain or IP address […]
Email Blacklists: Types, Checks, and How to Stay Off the List
Are your emails going to spam? Your email address could be in an email blacklist. An email blacklist is a categorized list of one or more email addresses, domains, or IP addresses that are suspected or flagged for sending spam, unwanted e-mail messages. If you get put on a blacklist your emails could be completely […]
