Warm up your Mailgun mailboxes with MailPilot
MailPilot warms up Mailgun sending domains over SMTP — you use your Mailgun SMTP credentials (smtp.mailgun.org, or the EU endpoint) and MailPilot sends warmup mail through your verified Mailgun domain, with IMAP handling replies on the inbox side. Mailgun is popular for transactional and outbound sending, but a freshly added Mailgun domain has no reputation, and Mailgun's shared IPs mean your domain and its authentication records carry the deliverability weight. Warmup builds that domain's standing before you turn on real volume.
How it works with Mailgun
Add and verify your domain
Add your sending domain in Mailgun and publish the SPF and DKIM DNS records it provides. MailPilot verifies them so warmup mail is properly signed.
Grab SMTP credentials
Copy your domain's SMTP login (postmaster@yourdomain plus password) and point MailPilot at smtp.mailgun.org (or the EU host) on port 587.
Connect IMAP for engagement
Add IMAP access to the receiving mailbox so MailPilot can open, reply to, and de-spam warmup emails — the interaction that builds reputation.
Ramp and measure
MailPilot increases volume gradually to build Mailgun domain reputation, then reports where your mail lands across the major inbox providers.
Why warm up Mailgun
A newly verified Mailgun domain has no sending history; on shared IPs, your domain reputation is what mailbox providers score, and warmup is how you build it from zero.
If you move to a Mailgun dedicated IP, it must be warmed gradually or providers will greylist and throttle the sudden new source.
Mailgun deliverability depends on correct SPF and DKIM records at your DNS host — MailPilot verifies both plus DMARC so authentication never silently breaks your ramp.
Mailgun warmup FAQ
Which Mailgun SMTP endpoint should I use? +
Use smtp.mailgun.org for US-region domains or smtp.eu.mailgun.org for EU-region domains, on port 587. Your SMTP username is typically postmaster@yourdomain with the password from Mailgun's domain settings; MailPilot also needs IMAP for reply handling.
Does warmup help Mailgun transactional deliverability too? +
Yes. Warmup builds your sending domain's reputation, which benefits every stream from that domain — transactional and outbound alike — since mailbox providers score the domain, not the message type.
What DNS records does Mailgun need for warmup to work? +
Mailgun provides SPF and DKIM records to add at your DNS host, and you should add DMARC as well. MailPilot's DNS checker confirms all three are valid before warmup so your mail is fully authenticated.
Warm up Mailgun the right way
Free plan available. 14-day trial on paid plans, from $9/mo. No credit card. Connect your Mailgun mailbox in minutes.
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