it turns out i am receiving unsolicited messages from IP ranges of a certain SPAM company.
It should be easy for the TB user to block messages from certain IPs, ranges. Yet it does not seem obvious for me on how to do it in TB 91.3.2 or to find extension which allows this.
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So far i have found this way (it was not user friendly to discover how to do it):
Thunderbird how to delete/filter out e-mail based on sender IP address/hostname
Tools/Message Filters
select e-mail account that receives the SPAM (unsure how to make filter for all)
New (button)
set name for example: Delete if sender IP or hostname contains
set radio button "Match any of the following"
set new rule: Customize...
set header variable: Received
(because when you click SPAM mail in inbox, "More" button, "View source", you could see following line for example:
Received: from [198.23.211.171] (port=54178 helo=spam.domain.here)
then in filters set next column to "contains"
next column to 198.23.211.
(that should match all IPs 198.23.211.0-198.23.211.254 - use only if you are receiving many messages from single SPAM range (IP differs only in last octet: x.x.x.0-x.x.x.254, else you would use single full IP or a hostname spam.domain.here))
Above mentioned is not convenient method. Also user should be able to use famous IP blocklists like stopforumspam.com instead of manually researching every SPAM message source and manually adding new IP filter each time, it is a joke.
Btw. i am wondering on how to forward SPAM e-mail as an attachment or print source code of the spam mail into forwarded message. Or at least add custom text to forwarded message.
