SMTP & Sending
Master TrekMail SMTP services. Choose between our fully managed SMTP solution or bring your own provider for maximum control and flexibility.
What you'll learn
- 1 how each domain chooses how it sends — managed TrekMail SMTP, your own SMTP profile, or the account-wide default — and how to set one default that every domain follows
- 2 Zero-config sending on Starter and up — how the shared IP pool, DKIM/SPF alignment, and reputation management work, plus when to use BYO SMTP.
- 3 How to connect SES, SendGrid, Mailgun, or other SMTP providers.
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Articles in this category
6 articles-
1Per-Domain SMTP & the Account Default
how each domain chooses how it sends — managed TrekMail SMTP, your own SMTP profile, or the account-wide default — and how to set one default that every domain follows
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2Managed TrekMail SMTP: How It Works
Zero-config sending on Starter and up — how the shared IP pool, DKIM/SPF alignment, and reputation management work, plus when to use BYO SMTP.
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3Bring Your Own SMTP (Custom SMTP)
How to connect SES, SendGrid, Mailgun, or other SMTP providers.
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4TrekMail Sending Limits by Plan
Review the daily sending limits for each TrekMail plan. Understand per-mailbox and per-account caps to plan your email volume accordingly.
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5Domain Warm-Up Rules
Warm-up percentages and examples for each plan.
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6Fixing Common Email Sending Errors
Decode SMTP error codes — 535 auth failed, 554 relay denied, 550 limit exceeded, port-25 timeouts, and SPF/DKIM bounces — with a fix for each.