mail

How do I repair/rebuild all mail configuration files and restore settings for all mailboxes?

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Resolution
This can be done with Plesk mchk utility:

# /usr/local/psa/admin/sbin/mchk --help
Synopsis:
mchk [OPTION]
--without-spam - restore all settings except for SpamAssassin configuration
--with-spam - restore all settings
--spam-only - restore only SpamAssassin settings

This utility rebuilds in line with Plesk database Qmail control files in the /var/qmail/control, /var/qmail/users directories and mail users’ settings. Also, it sets proper ownership/permissions for all mailboxes (/var/qmail/mailnames/*).

Example:
# /usr/local/psa/admin/sbin/mchk --with-spam

cPanel email inconsistent quota !

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If a cPanel email user quota does not match what is being reported by the system or a mail client run the following to determine how much space has been used for real:

du -hs /home/username/mail/userdomain.com/user/

then compare it with what cPanel reports for the disk usage, if they are different delete:

/home/username/mail/domain.com/user/maildirsize

finally re-login to cPanel and it should be resolved.

Error 550 – “The recipient cannot be verified” – cPanel

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On servers running cPanel, you may find that mail sent to valid users it bounced back by your mail server. The bounce back messages will be similar to the following.

PERM_FAILURE: SMTP Error (state 9): 550-"The recipient cannot be verified. 
Please check all recipients of this550 message to verify they are valid.
If this is occurring, you will need to check your exim_mainlog file for entries 
similar to the following.
H=(nf-out-0910.google.com) [IP] F=<[email protected]> rejected RCPT 
<emailAccount@domainName>: No Such User Here
If you are sure that email account does indeed exist, you will need to run the 
following commands to correct the issue.
/scripts/updateuserdomains
/scripts/mailperm 
You will then also need to check your /etc/localdomains file and verify that the 
domain name is present. Also verify that the DNS line in your 
/var/cpanel/user/username contains the domain as well.