Hello Community,in the meantime, we are receiving more and more complaints from our customers that too many emails are no longer arriving.I have noticed that many previously problem-free and unblocked emails are blocked by RBLs.After I removed the RBLs, all "correct" emails come through again.This problem first occurred about four weeks ago.I am wondering why the RBLs are suddenly sporadically rejecting emails that have been coming through flawlessly for years.Has anyone else here encountered such a problem?
Concerns various SOPHSO XG and XGS models.
Hello Michael Großmann,Thank you for reaching out to the community, so may we know were you using the pre-defined RBLs such as standard & premium RBLs OR you are using any custom ?> Address group: https://docs.sophos.com/nsg/sophos-firewall/19.0/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Email/AddressGroup/index.html> Add an address group: https://docs.sophos.com/nsg/sophos-firewall/19.0/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Email/AddressGroup/EmailAddressGroupAdd/index.html
Thanks & Regards,
Vivek Jagad | Technical Account Manager 3 | Cyber Security Evolved
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we're using only the two pre-defined premium RBLs.
have you checked with one of the sample e-mail where the sender's domain is black-listed or not ?
Yes, I have checked different email addresses to see if they are on any block list. None of the addresses were on blocklist, there were also many known addresses, which were never rejected in the past.Many email addresses are sometimes rejected (reason: blacklisted) and sometimes not rejected - even with the same email addresses. I have no idea how this can be.
Okay, is the email protection deployed in Legacy or MTA mode ?Can you share the debug logs for any one of the mail which was rejected ?To enable/disable debug: service smtpd:debu -ds nosyncTo enable/disable debug: service awarrensmtp:debug -ds nosyncLog file details: https://docs.sophos.com/nsg/sophos-firewall/19.0/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Logs/LogFileDetails/index.htmlRefer the SMTP section and collect the logs and revert !