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I've been running my own email server for 17 years, including hosting a large mailing list, and although it takes time I find it's perfectly possible, even today. Most of what should be done, you're already doing; but one factor you don't address is what kind of IP address you're using. Many mail providers outright blacklist (or use as a strong marker for ...


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This is more than likely the case. Most providers have in effect a spam and virus filter, so before the original email is delivered it will be caught and discarded / not forwarded. Is this an IP address dedicated to you? If not, others using the IP address (example case, shared hosting) may be contributing towards the negative reputation.


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When you move message, then dovecot invoke the sa-learn with dovecot's UID, so sa-learn hasn't enough permissions to update bayesian databases. You have to add dovecot's user to the spamd group and ensure you have the next line bayes_file_mode 0660 in the etc/spamassassin/local.cf file. Also you have to verify is bayes databases already have permissions ...


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Why worry about forwarding e-mail from spammers? Reject or defer any remote messages on connections that aren't authenticated. If you defer, any misguided legitimate server will eventually deliver according to your MX. If it is a spambot, they will usually not retry in either case. You can reject or deny as early as the "MAIL FROM" command. By that ...


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Finally I found a solution to filter outgoing spam with header_checks, though I do not know how effective and efficient it can be. Warning: this mitigation technique solution does not clean the infection. it is only useful when the attack sends spam by using the real domain name and faked user names or email accounts as senders (From:). when the infection ...


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Yes, "newmsg" tells the dns identification of the originating relay. It contains an "auth=" entry, in case submission was authenticated. "couriersmtp" (without final "d") is the SMTP client, which usually relays in turn. In theory, mail can also be relayed by UUCP, a rather unusual circumstance nowadays. You may want to check out Courier-analog, it is a ...


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Don't give up hope completely. Running your own mail server is sometimes a pain but it sounds like you're doing everything right. Generally I would say if they aren't blocking you outright (i.e. you get bounces back) then it's a content issue. Try adjusting the content somewhat. Microsoft aren't the best at anti-spam but they try hard for their users - ...



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