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"Wanna" ransomware outbreak. Please see this Sophos article sophos.com/kb/126733 for advice on how to protect your organization. Immediate action recommended.
How to troubleshoot a "socket_map_lookup(pmxbl)" error in the system mail log for PureMessage for UNIX, version 5.2.1 and later.
You may find the following errors in the system mail log and PureMessage pmx_log.
From the system mail log:
<time stamp> mail sendmail[<pid>]: <message id>: SYSERR(root): socket_map_lookup(pmxbl): failed to read length parameter of reply
From the PureMessage pmx_log:
0 <time stamp> [<pid>,pmx-blockerd] Error reading from MTA: Connection timed out
If you would like to allow certain senders and/or recipients before blocking messages based on relay IP addresses, then you should implement the 'Message is from blocked IP' test in your policy.
If the FEATURE(`delay_checks') feature is not used, then please contact Sophos Technical Support by sending a Support Request. We may ask you for your sendmail configuration file and your system mail log to troubleshoot further.
Every comment submitted here is read (by a human) but we do not reply to specific technical questions. If you need technical support please post a question to our community. Alternatively for licensed products open a support ticket.