I have setup Postfix to relay emails to our exchange 2016 server, but get an error when i try to send:
Nov 5 15:35:00 GC-NAGIOS postfix/smtp[9093]: 3FA883E2A2D: to=<my.u...@mymail.ac.uk>, relay=mail.mymail.ac.uk[123.19.1.19]:25, delay=1100, delays=1095/0.01/5/0, dsn=4.7.3, status=deferred (SASL authentication failed; server mail.mymail.ac.uk[123.19.1.19] said: 535 5.7.3 Authentication unsuccessful) The username and password are correct so i don't know why it wont authenticate with the mail server, i have checked it is in the right format (username:password), i don't know if there is anything i need to to do on the exchange server side for this to work. anyone got any ideas? -- Sent from: http://postfix.1071664.n5.nabble.com/Postfix-Users-f2.html
