On Thu, Jan 03, 2013 at 04:49:50AM +0100, Michael Blessenohl wrote: > /var/log/mail.info: > Jan 3 03:09:45 hostname postfix/smtpd[5781]: connect from > mail-we0-f173.google.com[74.125.82.173] > Jan 3 03:09:45 hostname postfix/smtpd[5781]: warning: Illegal > address syntax from mail-we0-f173.google.com[74.125.82.173] in RCPT > command: <"@"@example.com>
The RFC specifies the maximal valid character set for email addresses. Not all the constructs in this maximally valid character set are safe on security, anti-relay, robustness, legacy-compatibility and other grounds. This thread is a dead-end. If you want to waste your time, you could try setting: resolve_dequoted_address = no that might help, but I would not bet on it. -- Viktor.