CauseSmarterMail is used as mail server for Parallels Plesk Panel.
Spam forwarding exclusions is set up to "No restriction - forward all mail" in SmarterMail.
But this option is not applied for newly created domain in Plesk. Spam forwarding exclusions is set up to "Do not forward SPAM level medium and above" for newly created domain.
CausePlesk uses SmarterMail 4 API methods for creating domains. This version of API does not have functionality to create domains with smap forwarding exclusions. SmarterMail added this functionality in version 5.
ResolutionThis problem was discovered in Parallels Plesk Panel 9.x. Plesk library which is used for communication with SmarterMail was updated.
For applying hotfix replace the file %plesk_bin%\smartermailprovider.dll with the appropriate file from the attachment.
Hotifx for Parallels Plesk Panel version 9.3.x
Hotfix for Parallels Plesk Panel version 9.5.x
Create a copy of original file before applying hotifx.
After hotfix is applied Plesk will create domains in SmarterMail with correct settings. For old domains this option should be set up manually, through SmarterMail interface.