How can I change Exim4's default user for sending mail? I hate the www-data thing. When I try sending mail to certain people I get this error (found in /var/log/exim4/mainlog):
2011-04-24 01:10:54 1QDraw-0001mS-QS <= firstname.lastname@example.org U=www-data P=local S=385 2011-04-24 01:10:55 1QDraw-0001mS-QS ** email@example.com R=dnslookup T=remote_smtp: SMTP error from remote mail server after RCPT TO:<firstname.lastname@example.org>: host receiverdomain.com [188.8.131.52]: 550-Verification failed for <email@example.com>\n550-The mail server could not deliver mail to firstname.lastname@example.org. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.\n550 Sender verify failed 2011-04-24 01:10:55 1QDrax-0001mW-Gk <= <> R=1QDraw-0001mS-QS U=Debian-exim P=local S=1536 2011-04-24 01:10:55 1QDraw-0001mS-QS Completed 2011-04-24 01:10:55 1QDrax-0001mW-Gk => www-data <email@example.com> R=local_user T=mail_spool 2011-04-24 01:10:55 1QDrax-0001mW-Gk Completed
This is super annoying. I can send mail to Gmail and Yahoo users but not other mail providers as I get that error. How can I fix this?