Joachim Breitner's Homepage
Yesterday, I installed a tor server on my router, thinking of tor as something positive, that should be supported. I don't use it myself at the moment, but I thought I'd donate a few GB each month. I trusted the default settings to be strict enough to not be a help to e-mail spammers, but obviously, I was wrong: Today, a user of my mail system complained about a mail of his bouncing:
571 - MAIL REFUSED - IP (18.104.22.168) is in RBL black list bl.spamcop.net
A quick check on the spamcop status page confirms: "System has sent mail to SpamCop spam traps in the past week (spam traps are secret, no reports or evidence are provided by SpamCop)". And because of "System has been listed for less than 24 hours.", I figured that it is indeed tor's fault. A second check of tor settings reveals that, while port 25 is blocked by default, ports 465 (ssmts) and 587 (mail submission) are not, and at lest the 465 can be used to reach other mail servers.
I blocked these ports now, and hopefully I will be de-listed in 24 hours. But I really think tor should be as tor-server-admin-friendly as possible, otherwise not many people will donate resources to this basically good thing.