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Topic: MANY CRITICAL PROBLEM ISSUE NEED TO FIX! PLS HELP!

Hi All,

Please help for the following issue which happened today.

1.      Empty mails from mailer-daemon
** All users receive email from mailer-daemon with EMPTY CONTENT

2.      Slowness in sending/receiving emails
Seems the dovecot and postfix cannot handle such amount of users.  Now we have 5000+ users using

3.      Undelivered emails bounced back from mail system
Received many "nested MAIL command".  Have applied the
smtp_connection_cache_enable = 0
smtp_connection_cache_on_demand = 0
not sure it will totally fix the problem or not.


4.      Email queue stuck and mails are not cleared up totally
Michael helped to clean up emails from 8000 to 2000 but it cannot clean up further.  Now this is the most critical issue.


7.      Error deliver of emails, A to B but C received it. Mainly in web mail, when users open the mail, the content changed
Email send from A to B, when B open the mail in webmail, it will show C (other sender's email content) in the email.  But after they open the email, it will see the original email.  This is very important issue as it is SECURITY ISSUE.