Applicable to:
- Plesk for Linux
Symptoms
-
Mail delivery to particular domains fails with the following error message in
/var/log/maillog:CONFIG_TEXT: 0572C2801E1: uid=30 from=john.doe@example.com
0572C2801E1: message-id=6AD1BED0ECFB2E4FA52CC9B923AE4ED6A50F7157@example.com
0572C2801E1: from=john.doe@example.com, size=3826, nrcpt=1 (queue active)
0572C2801E1: host mx.example.net refused to talk to me: 554 IP=IP_ADDRESS - A problem occurred. (Ask your postmaster for help or to contact info@mx.example.net to clarify.) (BL) -
When manually connecting to the remote server from the error message (In this example, mx.example.net) using the telnet utility, connection fails:
# telnet mx.example.net 25
Trying mx.example.net....
Connected to mx.example.net.
Escape character is '^]'.
554 IP=IP_ADDRESS - A problem occurred. (Ask your postmaster for help or to contact info@mx.example.net to clarify.) (BL)
Connection closed by foreign host. - Or mail delivery via mail relay / smart host server fails:
hostname.example.com postfix/smtp[6568]: 547F6402BD: host smtp.example.org refused to talk to me: 550 5.7.1 [IIA] Connection refused the host "smtp.example.com" refuses the connection
Cause
Error code 554 means IP-Blocking: A remote mail server is not currently accepting emails from a server IP address. This IP blocking may be due to a previously observed unusual volume of emails at the IP address concerned.
Resolution
Contact administrator of a remote mail server/mail relay server.
For more information about a blacklisted mail server, see this KB article:
Comments
2 comments
Thanks for the article. I find the solution "> Contact administrator of a remote mail server", although fairly accurate, not entirely helpful and way too brief.
The fact of the matter with some of the most complex spamming issues it's not entirely possible to just "contact the administrator". Two notable example as iCloud and Microsoft. Both do not subscribe to the traditional idea of a block list and you cannot use tools such as MX Toolbox to find out if you've been listed there.
The big issue with blocking is it can lead to lost business - clients irate because you've been blocked and their email is not delivering. How often have I heard threats of cancelling because of blocking.
What would have have this article more help is links to some of these 3rd party services, or a link to some of the most common unblocking sites.
Hello Eugene van der Merwe
Thank you for sharing your user experience.
As for sharing links to some specific 3rd-party services, the choice is to be made by the customer.
We're not planning to add such links.
Thank you for understanding.
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