Server is sending SPAM but it's not an open relay

Posted by alexandernst on Server Fault See other posts from Server Fault or by alexandernst
Published on 2014-05-30T08:19:20Z Indexed on 2014/05/30 9:29 UTC
Read the original article Hit count: 160

Filed under:

postfix

|

spam

|

dovecot

I have a problem with Dovecot + Postfix. My server is sending SPAM from the local user "dovecot", but my server is not configured as an open relay (mails can be sent without auth-ing only from localhost). Also, nobody except me, has SSH access to the server.

How can I find what exactly is triggering all those SPAM mails? How can I get something like a backtrace that shows what exactly happened the moments before a SPAM email got in the queue of postfix?

Regards

© Server Fault or respective owner

Related posts about postfix

postfix: Temporary lookup failure

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have followed the tutorials step by step for installing and configuring postfix https://help.ubuntu.com/community/Postfix https://help.ubuntu.com/community/PostfixBasicSetupHowto I am trying to test the services to whether Temporary lookup failure error telnet localhost 25 250 2.1.0 Ok rcpt to:… >>> More
postfix with mailman

as seen on Server Fault - Search for 'Server Fault'
What should happen is that [email protected] should be delivered to that users inbox on localhost, user@localhost. Thunderbird works fine at reading user@localhost. I'm just using a small portion of postfix-dovecot with Ubuntu mailman. How can I get postfix to recognize the FQDN and deliver… >>> More
saslauthd + PostFix producing password verification and authentication errors

as seen on Server Fault - Search for 'Server Fault'
So I'm trying to setup PostFix while using SASL (Cyrus variety preferred, I was using dovecot earlier but I'm switching from dovecot to courier so I want to use cyrus instead of dovecot) but I seem to be having issues. Here are the errors I'm receiving: ==> mail.log <== Aug 10 05:11:49 crazyinsanoman… >>> More
centos postfix send email problem

as seen on Server Fault - Search for 'Server Fault'
Hello. I have a big problem with postfix. I can receive mail in webmin and outlook but I can't send (only on local I can - user to user). Dovecot is working just fine. Sendmail is disable. Please help me. postfix -n postfix: invalid option -- n postfix: fatal: usage: postfix [-c config_dir] [-Dv]… >>> More
Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend

as seen on Server Fault - Search for 'Server Fault'
So I've got 60 or so users on a hand rolled postfix installation on openbsd and I'd like to move their mailboxes to our new mail server running iRedMail (postfix, vmail/mysql back end) Does anyone know of a good way to do this? Preferably a script I can run to keep syncing the users mailboxes as… >>> More

Related posts about spam

spam spam spam spam [closed]

as seen on Stack Overflow - Search for 'Stack Overflow'
spam removed spam removed spam removed spam removed >>> More
Stop Outgoing Spam Already Tagged as Spam

as seen on Server Fault - Search for 'Server Fault'
Hi, I run a Postfix server with Amavis and Spamassassin among other things. Postfix receives mail from the outside world and passes it on to Amavis. Amavis has Spamassassin rate the mail, and then tags it as spam if necessary. Then Postfix relies on each users' procmailrcs to deal with the mail as… >>> More
spam check, spam score how to?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi. I am doing a app that is sending email and need to have a spam checker on the outgoing email. I have been looking for this a while now, I can not seem to find a good solution. I would like to use something like the spamassassin. Do you guys got any examples how to do the spamassassin with asp… >>> More
configure spam assassin to delete all spam above a score domain wide and override individual settin

as seen on Server Fault - Search for 'Server Fault'
Okay, so this is my scenario and what I want to try and do. I maintain a Red Hat email server running qmail and spamassassin. I have a domain that has well over 100 email account each with individual settings for spam scores and, whether or not to delete email incoming mail deemed spam. What I… >>> More
Make Thundirbird use and sync with Gmail Spam facility

as seen on Super User - Search for 'Super User'
I am using Thundirbird 3.1.7. I am using Gmail with it. When I mark a message as spam in Thunderbird, I want it to go to Gmail's spam folder. But it is not happening. The mail is only marked as spam and stays in Gmail's inbox. How can I setup Thunderbird so that when I mark a message as spam in… >>> More