Hello, runniong a small set up for around 30 people, which was working beautifully.

I recently tried to adjust some settings and Ive not been able to send mail since... hoping someone can help me, Ive not altered any MX records, so I doubt its a DNS issue.

I think ive probably changed a few settings in the admin console, and I new get loads of defered messages and the "mail for localhost loops back to myself" error. Id really appreciate a hand. Im 99% certain its something ive done in the admin console.

The MTA set up page is

webmail mta hostnames:localhost
relay: localhost port 25
MTA trusted networks:
and DNS lookup is enabled... id be grateful if you could help me!