This article applies to:

• Trustwave MailMarshal (SEG)
• Watchguard Firewall

Symptoms

• New local domain added
• Mail from external servers is not delivered
• MailMarshal server logs show connection established but quit before email body was received
• Possible error message '553 Requested action not taken: mailbox name not allowed or chunk too large'

Causes

• Watchguard Firewall Proxied SMTP Server is blocking transmission.

Resolution:

Ensure that the Watchguard firewall settings for Proxied SMTP Services are configured to allow incoming email to the new domain.

Notes:

• For details of Watchguard configuration please refer to Watchguard documentation.
• Other vendors' firewalls may cause similar issues.