Issues using Gravity SMTP with Custom SMTP with MailTrap

CCIWA Accounts
Mon, 15 Dec 2025 00:54:33 +0000
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Migrating from WP Mail SMTP to Gravity SMTP

I capture emails out of development environments in MailTrap.

Using the documentation below, I have set the constants for MailTrap account inbox

Connecting to Custom SMTP - Gravity SMTP Documentation

Custom SMTP Constants - Gravity SMTP Documentation

However, when sending a test email using the Gravity SMTP tools, it fails to send without providing any details within the log to why it fails to send.

I have tried both ports 587 & 2525, and neither works with Gravity SMTP.

Has anyone else experienced this issue with setting up Custom SMTP?

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