I have recently been setting up my email on the linux side and decided to use a tip that I found in an old addition of the linux gazette.
Basically the idea is to create a filter for mail leaving the local system. I tried to use it a few times but the mail keep being sent back with the following: A message that you sent could not be delivered to all of its recipients. The following address(es) failed: [EMAIL PROTECTED]: SMTP error from remote mailer after MAIL FROM: <[EMAIL PROTECTED]> SIZE=1412: host mail.inet.fi [192.54.155.189]: 553 hampaita.fi does not exist Anyway here is the code in question. #!/usr/bin/perl while (<>) { if (/^From: /) { s/<.*>/<[EMAIL PROTECTED]>/; print; last; } print; } while(<>){ print; } The idea is to place a reference to this on exim.conf and it would be used when mail was being sent outside of the system. I know next to nothing about perl and I'm not sure whether the author may have made a typo or the syntax may be outdated. When I try to source it I get the following: bash: /usr/local/bin/mail-filter: line 3: syntax error near unexpected t oken `()' bash: /usr/local/bin/mail-filter: line 3: `while () {'