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  1. Replies
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    Had the same problem. After some digging I found...

    Had the same problem.
    After some digging I found that these log entries are caused by SMTP authentication.

    Steps to reproduce:

    ivan@nsk-eclipse:~> echo test_user | base64
    dGVzdF91c2VyCg==
    ...
  2. Replies
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    9,470

    Instead of querying LDAP in...

    Instead of querying LDAP in smtpd_sender_login_maps, you can make a simple one-to-one map:

    /opt/zimbra/postfix/conf/sender_map:

    /^(.*)$/ $1

    /opt/zimbra/postfix/conf/main.cf:
    ...
  3. Bug 45103 – Zimbra performs From/To header...

    Bug 45103 – Zimbra performs From/To header normalization for all emails, which may be confusing if incoming email has malformed From/To
  4. Well, after some researching I found a proper way...

    Well, after some researching I found a proper way to fix my problem.
    Amavis injects scanned email back to postfix via special smtpd instance, listening on localhost:100025, which has its own set of...
  5. Let me explain my point again. Yes, spamers can...

    Let me explain my point again.
    Yes, spamers can send emails from @$mydomain, but from my experience:
    - they prefer not to do it because they aware of sender verification, such as SPF and DKIM
    - if...
  6. Thanks. Are you sure all spam emails are...

    Thanks.

    Are you sure all spam emails are rejected by spam filter? If that was true there would not be such problem in the world as SPAM. :-)
    This issue bothers me because my users receiving spam...
  7. [SOLVED] Zimbra default settings for mail headers rewrite

    Hello,

    When email is received with badly formed From/To headers:

    From: an evil spammer@spam.com
    To: me
    it is rewritten the following way:

    From: an@$mydomain, evil@$mydomain,...
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