Overview
All emails get rejected with a permanent 550 error on Simple Mail Transfer Protocol (SMTP) level when Greylisting is enabled in MailEssentials. The error message should be similar to the following:
550 5.7.1 Command not allowed
Environment
- GFI MailEssentials
- All supported environments
Root Cause
There is an invalid value in the actionflag field.
Resolution
- Stop all MailEssentials services (disable both Scan Services so they do not get restarted).
- Make a backup copy and open the config.mdb found in
..\GFI\MailEssentials\AntiSpam\with MS Access. - Open the table Actions.
- Locate the line with the
stringid greylistingand change the value in theactionflagfield to4096. - Close the database and restart the MailEssentials services.