> I'm running Exim 4.20 on Solaris 9.
> I'm having troubles with addresses with a leading backslash, like
> <\xyz@???>. Exim seems to ignore the backslash and correctly routing the
> message to our Exchange-Server. But this one doesn't recongize this address
> and forwards it to our MX, which is Exim, leading to a mail loop.
>
> I wanted to modify the Default ACL
> deny local_parts = ^.*[@%!/|] : ^\\.
> by adding the backslash in the character class, like
> deny local_parts = ^.*[\\@%!/|] : ^\\.
> or
> deny local_parts = ^.*[\\134@%!/|] : ^\\.
Try:
deny local_parts = \N^.*[\\@%!/|]\N : ^\\.
or
deny local_parts = ^.*[\\\\@%!/|] : ^\\.
Since it's expanded before use, it'll turn into this after expansion:
^.*[\\@%!/|] : ^\.
yours turns into:
^.*[\@%!/|] : ^\.
