Issue Spam Filter whitelist and greylisting

[websavers]

Server operating system version

AlmaLinux 9.8

Plesk version and microupdate number

Plesk Obsidian 18.0.78 Update #4

A customer had an issue with greylisting blocking hellosign.com. The customer added *@hellosign.com to their email account's Spam Filter whitelist, thinking that would help (fair).

When I went looking at the greylisting config, I was surprised to find the Spam Filter whitelist entry really is added to the greylisting white list for that user:

# plesk bin grey_listing --info-mailname <email>
Grey listing configuration for <email>

User's black list:

User's white list:
*@hellosign.com

I didn't realize that white list function affected the greylist, so that's kinda neat.

The only problem is it doesn't work. I suspect it's because the greylisting whitelist works by server name and not email address. If I'm right about this, it seems like this would be an easy fix. When Plesk is adding the entry to the greylist white list, simply replace the "@" with "." so in the example above, *@hellosign.com would become *.hellosign.com and therefore match hellosign's server subdomains.

 

[scsa20]

The *@hellosign.com is the proper way of doing it but I think what's happening is that personal configurations isn't enabled. You can enable it by doing the following:

plesk bin grey_listing --update-server -status on -personal-conf true

If you are using the plesk email security extension, then that wouldn't be needed and would simply need to add @hellosign.com to the whitelist for the domain.