Background

When I configure email accounts in Webuzo and try to send mail from account which already resides in: /etc/aliases I get the following error:

Requested action not taken: mailbox unavailable 550 Sender verify failed

The problem is that the default exim.conf which Webuzo installs has badly configured order of mail routers.
Here are some FIXES for this problem:

FIX 1 (Recommended)

1. Backup exim.conf:

cp -a /etc/exim.conf{,.bak}

2. Open /etc/exim.conf

Find the section which is used for searching domains in /etc/alias file. The router section looks like this

system_aliases:
  driver = redirect
  allow_fail
  allow_defer
  data = ${lookup{$local_part}lsearch{/etc/aliases}}
# user = exim
  file_transport = address_file
  pipe_transport = address_pipe

....
....
# SOME CONTENT
....
....

vmail_deliver:
  driver = accept
  condition = ${if eq {}{${lookup{$local_part}lsearch{/etc/vmail/$domain/passwd}}}{no}{yes}}
  domains = dsearch;/etc/vmail
  no_more
  retry_use_local_part
  transport = vmail_delivery

Edit exim.conf and change the order of the 2 routers, and make them look like that:

vmail_deliver:
  driver = accept
  condition = ${if eq {}{${lookup{$local_part}lsearch{/etc/vmail/$domain/passwd}}}{no}{yes}}
  domains = dsearch;/etc/vmail
  no_more
  retry_use_local_part
  transport = vmail_delivery
....
....
# SOME CONTENT
....
....
system_aliases:
  driver = redirect
  allow_fail
  allow_defer
  data = ${lookup{$local_part}lsearch{/etc/aliases}}
# user = exim
  file_transport = address_file
  pipe_transport = address_pipe

 

Save exim.conf and restart exim server:

/etc/init.d/exim restart

 

FIX 2 (alternative)

Comment out the problematic lines from /etc/aliases  and restart exim.