[courier-users] Mailfilter and '&' in email address

[Svetozar M. <courier@j.zarhi.com>]

Hello,

Recently I discover email in queue which stays forever and delivers over
and over. The problem was '&' in local part of email address.

Server is Centos 5.7, courier-authlib-0.63.0, courier-0.65.0.

Logs:

Jan 31 15:50:30 courierd:
started,id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,module=local,hos...@ex...!!1001!1001!/home/vmail/example.com/all!!1000000000S,addr=<al...@ex...>
Jan 31 15:50:36 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>: sh: m...@ex...: command not found
Jan 31 15:50:36 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>: maildrop: error writing to mailbox.
Jan 31 15:50:36 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>: maildrop: Unable to deliver to mailbox.
Jan 31 15:50:36 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>,status: deferred
Jan 31 15:55:36 courierd:
started,id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,module=local,hos...@ex...!!1001!1001!/home/vmail/example.com/all!!1000000000S,addr=<al...@ex...>
Jan 31 15:55:41 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>: sh: m...@ex...: command not found
Jan 31 15:55:41 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>: maildrop: error writing to mailbox.
Jan 31 15:55:41 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>: maildrop: Unable to deliver to mailbox.
Jan 31 15:55:41 courierlocal:
id=0000000000A68015.000000004F279986.00005EF9,from=<em...@ex...>,addr=<al...@ex...>,status: deferred

.mailfilter problem line:

cc "!m&m...@ex..."

Is '&' are allowed char in email address? If yes, how to escape '&'
in .mailfilter? There is no other problems with 'm&m...@ex...'.

Thanks,
Svetozar Mihailov