More over issue not in SRS, issue actually about postfix in general. I don't know why there no defaults to do any validations check of sender|rcpts.

Regards,
Dmytro Alieksieiev
DevOps Engineer

On 18/04/2025 13:20, Benny Pedersen via Postfix-users wrote:
Dmytro Alieksieiev via Postfix-users skrev den 2025-04-18 11:17:

smtpd_recipient_restrictions =
    check_recipient_access
regexp:/etc/postfix/recipient_address_length_restrictions
    ...

/etc/postfix/recipient_address_length_restrictions
/^.{38,}@/    554 5.1.7 Recipient address rejected: Localpart is too
long.

38 chars and greater chosen due to SRS need also some space.

one more reason to not use SRS ? :=)

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