The Email Deliverability Tool For Agencies That Protects Every Client
Your agency's entire service is email. Deliverability isn't a feature. It's your reputation with clients. Warmy is the email deliverability platform under every client account you manage. It covers inbox placement testing, warm-up, reputation and blacklist monitoring, SPF, DKIM and DMARC checks and email verification. You run it all from one agency account and share the results with each client.
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35,000+
Businesses rely on Warmy
98%
Average inbox placement reached
140+
Integrations for B2C senders, from Klaviyo to Salesforce Marketing Cloud
24/7
Human deliverability support
TRUSTED WORLDWIDE
Trusted By Email Marketing Agencies Worldwide
What Is An Email Deliverability Tool For Agencies?
An email deliverability tool for agencies is software that lets an agency check and protect inbox placement for multiple clients from a single account. It tests where each client's campaigns land, warms up and monitors every sending domain, tracks sender reputation, blocklists, and SPF, DKIM, and DMARC, and verifies lists before sending.
Warmy does all of that under the hood of the email service providers your clients already use, so your team can prove deliverability instead of guessing.
AGENCY DELIVERABILITY
Why Email Deliverability Decides Which Clients Stay
Clients hire an email marketing agency to drive revenue, and every result starts in the inbox. When a campaign lands in spam, nobody blames Gmail. They blame the agency.
0.3%
Spam complaint rate Gmail and Yahoo require bulk senders to stay below (aim for under 0.1%)
5,000+
Emails a day that make a client a bulk sender at Gmail and Microsoft
3
Authentication protocols required from bulk senders: SPF, DKIM and DMARC
1. Every client brings a new sending domain
One client sends from Klaviyo, another from HubSpot, a third from Salesforce Marketing Cloud. Each brings its own domains, DNS records, list history and sending volume. Checking them one by one, in a different dashboard for each, doesn't scale past a handful of retainers.
2. Clients judge you by the spam folder
An ESP report says "delivered" even when the campaign sits in spam, and open rates inflated by Apple Mail Privacy Protection can hide the problem for weeks. Then revenue from the channel drops, and the client asks whether the agency is the problem. Without placement data, you can't show them it isn't.
3. Spot checks miss deliverability issues
A broken DKIM record after a DNS change, a blocklist listing, a jump in spam complaints after the client uploads an old list: each one can quietly drag a client's domain reputation down. You need monitoring across every account, not a test before Black Friday.
One Email Deliverability Platform Under Every Client Account
Warmy doesn't replace your clients' ESPs or send their campaigns. It sits underneath them and ensures Gmail, Outlook, and Yahoo trust every client's sending domain from one place.
1. Every client in one agency account
See all your clients in one list and switch between them without separate logins. Set access levels for your team and for each client, and manage settings and billing from a central admin console.
2. Inbox placement testing with test emails
Run an Inbox Placement Test on a client's real campaign or flow email before it goes out. Send test emails, and the results show whether the message landed in the primary inbox, the Promotions tab, spam or went missing at each provider. Set a test schedule to monitor inbox placement between big sends.
3. Email warm-up in real inboxes
Warm up a new branded sending domain, a domain after an ESP migration or one recovering from a spam problem. Warmy's 1M+ network of real mailboxes, including the consumer inboxes your clients' subscribers use, opens the emails, replies and moves them out of spam. If a client's ESP can't be connected directly, a Warmy Seed List does the same job from inside it.
4. Reputation monitoring and Google Postmaster Tools
Track domain and IP reputation for every client, with blacklist alerts the moment a signal drops. Google Postmaster data sits beside each client's warm-up and placement results, so you see what Gmail sees without logging in to another tool.
5. Email authentication: SPF, DKIM and DMARC
DNS health checks and DMARC monitoring show whether SPF, DKIM and DMARC are set up and aligned for each client's domains, and they give you the exact record to change. Send it straight to the client's IT team.
6. Email verification for invalid addresses
Clean a client's list before importing it into a new ESP or sending it to an old segment. Verification checks syntax, MX records, and mailboxes, and flags catch-all, disposable, and role addresses, known spam traps, and complainers, so invalid email addresses never turn into hard bounces.
Get a deliverability plan built around your client roster and their monthly sending volume.
Email Deliverability Features Built For How Agencies Work
Running deliverability for one brand is a job. Running it for twenty clients is a system. These are the parts of Warmy that make it work at agency scale.
Client access levels and central admin
Give team members and clients the access they need, and nothing more. Admins customize access levels and manage settings and billing for every client from one console.
A deliverability report clients can read
Track every client's results on one dashboard and share them with the client. Placement by provider, reputation, blocklist status and authentication in one view turns "trust us" into proof for the monthly report.
Add domain monitoring to your retainer
Deliverability is work your clients will pay for. Package audits, monthly monitoring and fixes as a service, instead of doing them for free every time open rates dip. With every client in one account, you don’t need separate deliverability monitoring tools.
Expert help when domain reputation slips
Every plan includes an onboarding manager and 24/7 human support in your own Slack, WhatsApp or Teams channel. Premium plans and above add priority 24/7 support, and Expert and Platinum add a deliverability consultant, backed by a team of 120+ deliverability specialists.
AI that reads deliverability data
Adeline, Warmy's AI deliverability agent, reads each client's tests, DNS and warm-up data and tells you what to fix next. When a client asks why results dropped, your account manager can answer clearly. To optimize email campaigns before they go out, the Templates AI optimizer scores each template and rewrites parts likely to trigger spam filters.
Warm-Up, Seed List Or Inbox Test?
Three of these build sender reputation, and one measures it. Most email marketing agencies use all four across their client roster.
Warm-Up:
mailboxes in Warmy's network open the client's emails, reply to them and move them out of spam. For any sending domain or mailbox you can connect.
Warm-Up with Clicks:
warm-up plus scrolling and link clicks, for emails that carry links, which is nearly every marketing email.
Seed List:
Warmy addresses added to the client's own ESP list, where emails sent to them are opened, scrolled and clicked. For ESPs that can't connect to Warmy directly.
Inbox Placement Test:
shows where messages land at each provider: inbox, promotions, spam or missing. Run it before a launch, a big campaign or a new sending domain.
Every Client's Email Campaigns, Actually Delivered
Every account on your roster depends on inbox placement. Warmy protects all of them.
New client audits and email configuration analysis
Start every new account with an audit: DNS health checks, an Inbox Placement Test on a recent campaign, reputation and blocklist status, and a verified list. You find inherited problems in week one, before they show up in a campaign with your name on it.
eCommerce email agency clients
An ecommerce email agency lives on welcome, abandoned cart and post-purchase flows, plus a handful of sale days that make the client's year. Warm up ahead of peak season, test placement before each big blast, and keep reputation monitoring running while volume spikes. See Warmy for eCommerce brands.
SaaS and B2B lifecycle clients
Onboarding sequences, product updates and newsletters have to reach both corporate inboxes and personal Gmail accounts. Test placement at each provider before a product launch, and warm up any new domain before it carries the client's lifecycle program.
Warm up emails on new sending domains
Moving a client from one ESP to another, or onto a new branded sending domain, resets much of what mailbox providers know about them. Verify the list before import, warm up emails from the new domain for two to four weeks, and confirm placement before full volume.
Transactional emails that can't wait
Order confirmations, password resets and receipts can't share a reputation problem with a promo blast. Monitor transactional and marketing domains separately, so a complaint spike on one never reaches the other.
A positive sender reputation without spam complaints
Win-back campaigns to old segments are where complaints and spam traps hide. Verify first, start with the most recently engaged contacts, and test placement on each wave before you widen the send.
Works With The Email Service Providers Your Clients Use
Warmy works with any sending platform. No migration, no switching providers and no changes to your clients' stacks. Connect in one of three ways:
Direct connection: a supported ESP, any SMTP/IMAP mailbox, Google Workspace or Microsoft 365.
API and automation: the Warmy API, plus n8n, Zapier and Make.
Seed List: add Warmy's addresses to a client's own ESP list when a platform can't be connected directly.
- Klaviyo
- Shopify
- Mailchimp
- HubSpot
- Salesforce Marketing Cloud
- SendGrid
- ActiveCampaign
- Brevo
- Omnisend
- Amazon SES
- Mailgun
- Any SMTP or IMAP mailbox
140+ integrations for B2C senders
70+ for B2B senders
Your ESP Sends Email Marketing Campaigns. Warmy Gets Them To The Primary Inbox.
Audience
- Your clients' ESPs
- Segments, lists and personalization
- Warmy
- Email verification that removes invalid and risky addresses first
Message
- Your clients' ESPs
- Templates, subject line tests and send times
- Warmy
- Templates AI optimizer and Inbox Placement Tests before you send
Sending
- Your clients' ESPs
- Flows, automations and send scheduling
- Warmy
- Warm-up and Seed Lists for every sending domain, before and during live campaigns
Reporting
- Your clients' ESPs
- Opens, clicks and revenue
- Warmy
- Placement by provider, reputation, blocklist and DMARC monitoring, plus Adeline when something slips
The best campaign in the spam folder is still unread. Your agency owns the campaign; Warmy keeps the inbox open for it.
How To Choose The Best Email Deliverability Tools For An Agency
Many agencies stitch together other email deliverability tools, an email validation service and spam test credits, each covering basic deliverability features for one client at a time. Good email deliverability software covers your whole roster. Look for:
Every client in one login, with access levels for each
Inbox placement features that show inbox, promotions, spam or missing at each provider
Reputation and blocklist alerts with Google Postmaster data for every client domain
Authentication checks and list verification built in, not bought separately
API access on every plan, not only on professional and enterprise plans
Warmy covers all five in one platform.
What Better Inbox Placement Is Worth For Your Clients
Deliverability sits under every number in a client report. When more of each send reaches the inbox, clicks and revenue follow, and the client renews.
2.3×
Higher open rates
95%
Inbox placement
−35%
Lower bounce rates
Illustrative example based on typical lift. Actual results depend on list quality, content and sending history.
Inbox insights to share in every client report
- Inbox placement rate:
- how much of each campaign reaches the inbox at each provider
- Domain health:
- domain and IP reputation from Google Postmaster data, blocklist status and third-party scores like Sender Score
- Spam complaints:
- how often subscribers mark the client's email as spam (keep it well under 0.3%)
- Bounce rate:
- list quality and data freshness
- Authentication status:
- SPF, DKIM and DMARC passing on every sending domain
- Clicks and revenue per email:
- whether subscribers act on the campaign, a more reliable signal than opens
Warmy shows the deliverability side of these metrics for every client, so you can tell a content problem from an inbox problem and explain it in the client's language.
“If you’re an agency owner or you’re doing email outreach at scale, I highly recommend Warmy as a service provider.”
Frequently Asked Questions
An email deliverability tool for agencies is software that checks and protects inbox placement for multiple clients from a single account. It tests where each client's emails land, warms up and monitors sending domains, tracks sender reputation and blocklists, checks SPF, DKIM and DMARC and verifies lists. Warmy is an email deliverability platform built this way, with an agency account, client access levels and results you can share.
With one account that holds every client and runs the same checks for each. In Warmy's agency account, you see all your clients in one list, set access levels for your team and each client, and share results. Every client gets Inbox Placement Tests, warm-up, reputation and blocklist monitoring, DNS and DMARC checks and email verification, managed from one place.
Yes. Warmy tracks every client's results on one dashboard, and you can give each client their own access or share results with them. Placement by provider, reputation, blocklist status and authentication give you hard numbers for monthly reporting and renewal conversations.
Usually because of sender signals, not the copy alone. Common causes include a new or under-warmed sending domain; missing or misaligned SPF, DKIM and DMARC; a blocklist listing; old lists that bounce or hit spam traps; sudden volume spikes; and rising spam complaints. An Inbox Placement Test shows where the email lands, and Warmy's monitoring shows which signal is behind it.
Spam analysis of a template shows how a spam filter is likely to read the copy: spammy wording, risky links and image-heavy layouts. Setup matters just as much, since missing authentication records, unverified lists and sudden volume jumps can each trigger spam filters even when the offer is legitimate. Warmy's Templates AI optimizer, DNS health checks, email verification and Inbox Placement Tests catch these before a client's campaign goes out.
An inbox placement tool sends a copy of your email to test mailboxes at different inbox providers and reports where it landed. Warmy's Inbox Placement Test shows, for each provider, whether the email reached the inbox or the promotions tab, landed in spam or went missing. Run it on the client's real template, domain and subject line so the results match the real send.
An email spam checker reviews a template's content, wording, links and formatting that could look like spam. An inbox test sends the real email and shows where it lands at each provider. The spam checker helps you fix copy before you send; the inbox test tells you what mailbox providers did with it. Together, these two spam tests cover both the copy and where it lands.
Gmail, Yahoo and Microsoft require SPF, DKIM and DMARC from bulk senders, with Gmail and Microsoft drawing the line at about 5,000 emails a day. Gmail and Yahoo also require one-click unsubscribe and a spam complaint rate below 0.3%. Warmy's DNS health checks and DMARC monitoring show what each client's domain has in place and the exact record to change.
Spam traps are hidden by design, so no tool can find every one. Warmy handles spam trap risk in two places: email verification flags known spam traps before an address reaches a send, and blocklist monitoring alerts you when a listing appears, which is often the first sign of a spam trap hit. Regular list hygiene covers the rest.
Not at Warmy. A documented API is included in every plan, with automation through n8n, Zapier and Make. Agencies use it to add new clients without manual setup and to pull warm-up, test and monitoring data into their own reporting.
No. Warm-up is one part of the platform. Warmy also runs Inbox Placement Tests, monitors domain and IP reputation and blocklists, checks SPF, DKIM and DMARC, verifies lists, scores templates and includes Adeline, an AI deliverability agent that tells you what to fix. For an agency, it replaces a separate warm-up tool, spam checker, validation service and monitoring tool with one platform.
Plans start from $49/month. There’s no free plan, but you can start a 7-day free trial with no credit card required. Every plan and price is visible in your dashboard once the trial starts.
WHY WARMY
Your clients hire email marketers. They keep the ones who reach the inbox.
Agency work is judged on results, and email results start with deliverability. One client's broken DNS record or blocklisted domain can cost you the account, however good the creative was.
Warmy is the platform that handles it for every client: inbox placement monitoring, continuous warm-up, reputation and blocklist monitoring, authentication checks, list verification and template scoring, all under one agency account. It's built by 120+ deliverability specialists, so your team can focus on strategy and creative instead of DNS records.
FREE TOOLS
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For Email Marketing Agencies
Stop Losing Clients To The Spam Folder
Book a 30-minute demo. Bring a client domain or two, and we'll show you where their campaigns land today, what's holding placement back and how to run deliverability for your whole roster from one account.
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