Re: [exim] Exim relaying but shouldn't

P.S. No, the culprit is the apostrophe in auth login-name:

> A=login_server:#xxxyyyy'uuss+zzz

> server_condition = ${run{/bin/sh -c "echo -e '$auth1\n$auth2' | /usr/sbin/pwauth"}{1}{0}}

You need to add:

 deny message = Restricted characters in address
      senders = ^.*['"$#]