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    How to Mail Rule for empty senders?

    Dear experts, does someone know why my rule is not hitting the mails with empty senders? I think it has to do with my What-Filter, do I maybe have to filter for field "Return-Path"? There is a mail with empty sender which is blocked, but beacuse of another rule with lower priority...
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    [SOLVED] Problem with Regex Filtering

    Dear Proxmox experts, I have a rule active (for quarantining mails) with a bunch of match fields, but two specific match fields are not working, the test-button says my regex is okay and working, but the mail isn't filtered out by the rule with the match fields: match field/s: Return-Path...