Mail clients in am environment defended by a Symantec Messaging Gateway are not receiving some external emails. A distinctive SMTP 550 5.7.1 error appears in the logs.
- 5.7.1 SMTP:550 5.7.1 sender id (pra) not permitted SMTP:
- Probability some RFC question
- The relay is blocked by mail server
Assigning the Symantec Messaging Gateway IP to relay exceptions in mail server will resolve this issue.
Perform a telnet test to see if the issue occurs when manually attempted:
220 server.domaindst.com.br Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 read
y at Thu, 12 May 2011 10:33:52 -0300
250 server.domaindst.com.br Hello [xxx.xxx.xxx.xx]
mail from: firstname.lastname@example.org
250 2.1.0 email@example.com....Sender OK
rcpt to: firstname.lastname@example.org
250 2.1.5 email@example.com
354 Start mail input; end with <CRLF>.<CRLF>
Teste de Envio de e-mail
550 5.7.1 Sender ID (PRA) Not Permitted
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This will clear the history and restart the chat.