smtp_helo_name reference
Overrides the hostname sent by the Postfix SMTP client in EHLO or HELO.
Purpose
Overrides the hostname sent by the Postfix SMTP client in EHLO or HELO.
Syntax
smtp_helo_name = valueIllustrative example
# /etc/postfix/main.cf
smtp_helo_name = VALUE
postfix check
systemctl reload postfixVersion-sensitive: Replace VALUE with a setting appropriate to your topology. Verify exact syntax, scope and defaults against the documentation for the installed version.
Production guidance
- Change one variable at a time
- Document the reason for the value
- Test effective behavior, not only parser acceptance
- Monitor delivery responses after deployment
- Keep a rollback copy
Common mistakes
Common failures include using the directive in the wrong scope, copying syntax from another software version, referencing an undefined object, choosing a value that conflicts with provider signals, or reloading without validation.