Nov 22 23:25:43 li28-40 postfix/master[1995]: daemon started -- version 2.5.5, configuration /etc/postfix
Nov 22 23:25:43 li28-40 postfix/pickup[2001]: warning: 52F78A419: message has been queued for 1 days
Nov 22 23:25:43 li28-40 postfix/pickup[2001]: 52F78A419: uid=0 from=<root>
Nov 22 23:25:43 li28-40 postfix/cleanup[2003]: warning: connect to mysql server localhost: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Nov 22 23:25:43 li28-40 postfix/cleanup[2003]: warning: 52F78A419: virtual_alias_maps map lookup problem for root@dontfightthefuture.com
Nov 22 23:26:30 li28-40 postfix/smtpd[2018]: connect from cpc6-newc13-2-0-cust131.gate.cable.virginmedia.com[94.170.20.132]
Nov 22 23:26:31 li28-40 postfix/smtpd[2018]: warning: connect to mysql server localhost: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Nov 22 23:26:31 li28-40 postfix/smtpd[2018]: NOQUEUE: reject: RCPT from cpc6-newc13-2-0-cust131.gate.cable.virginmedia.com[94.170.20.132]: 451 4.3.0 <ejr.morgan@gmail.com>: Temporary lookup failure; from=<ed@dontfightthefuture.com> to=<ejr.morgan@gmail.com> proto=ESMTP helo=<rivendell.dontfightthefuture.com>
Nov 22 23:26:33 li28-40 postfix/cleanup[2003]: warning: 7E5A0A419: virtual_alias_maps map lookup problem for postmaster@dontfightthefuture.com
Nov 22 23:26:33 li28-40 postfix/smtpd[2018]: disconnect from cpc6-newc13-2-0-cust131.gate.cable.virginmedia.com[94.170.20.132]
Nov 22 23:26:43 li28-40 postfix/pickup[2001]: warning: 80A72A419: message has been queued for 1 days
Nov 22 23:26:43 li28-40 postfix/pickup[2001]: 80A72A419: uid=0 from=<root>
Nov 22 23:26:43 li28-40 postfix/cleanup[2003]: warning: 80A72A419: virtual_alias_maps map lookup problem for root@dontfightthefuture.com
Nov 22 23:27:43 li28-40 postfix/pickup[2001]: warning: 843E0A419: message has been queued for 1 days
Nov 22 23:27:43 li28-40 postfix/pickup[2001]: 843E0A419: uid=0 from=<root>
Nov 22 23:27:43 li28-40 postfix/cleanup[2003]: warning: connect to mysql server localhost: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Nov 22 23:27:43 li28-40 postfix/cleanup[2003]: warning: 843E0A419: virtual_alias_maps map lookup problem for root@dontfightthefuture.com
Nov 22 23:28:43 li28-40 postfix/pickup[2001]: warning: 81353A419: message has been queued for 1 days
Nov 22 23:28:43 li28-40 postfix/pickup[2001]: 81353A419: uid=0 from=<root>
Nov 22 23:28:43 li28-40 postfix/cleanup[2003]: warning: 81353A419: virtual_alias_maps map lookup problem for root@dontfightthefuture.com
Nov 22 23:28:51 li28-40 postfix/master[1995]: terminating on signal 15
Nov 22 23:28:51 li28-40 postfix/master[2116]: daemon started -- version 2.5.5, configuration /etc/postfix
Nov 22 23:28:51 li28-40 postfix/pickup[2123]: warning: 7CED9A419: message has been queued for 1 days
Nov 22 23:28:51 li28-40 postfix/pickup[2123]: 7CED9A419: uid=0 from=<root>
Nov 22 23:28:51 li28-40 postfix/cleanup[2124]: warning: connect to mysql server localhost: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Nov 22 23:28:51 li28-40 postfix/cleanup[2124]: warning: 7CED9A419: virtual_alias_maps map lookup problem for root@dontfightthefuture.com
Nov 22 23:28:56 li28-40 postfix/smtpd[2127]: connect from cpc6-newc13-2-0-cust131.gate.cable.virginmedia.com[94.170.20.132]
Nov 22 23:28:57 li28-40 postfix/smtpd[2127]: warning: connect to mysql server localhost: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Nov 22 23:28:57 li28-40 postfix/smtpd[2127]: NOQUEUE: reject: RCPT from cpc6-newc13-2-0-cust131.gate.cable.virginmedia.com[94.170.20.132]: 451 4.3.0 <ejr.morgan@gmail.com>: Temporary lookup failure; from=<ed@dontfightthefuture.com> to=<ejr.morgan@gmail.com> proto=ESMTP helo=<rivendell.dontfightthefuture.com>
Nov 22 23:28:58 li28-40 postfix/cleanup[2124]: warning: BFF5AA419: virtual_alias_maps map lookup problem for postmaster@dontfightthefuture.com
Nov 22 23:28:58 li28-40 postfix/smtpd[2127]: disconnect from cpc6-newc13-2-0-cust131.gate.cable.virginmedia.com[94.170.20.132]
-------

Error from Thunderbird -

An error occurred while sending mail. The mail server responded:  4.3.0 <ejr.morgan@gmail.com>: Temporary lookup failure. Please check the message recipient ejr.morgan@gmail.com and try again.