Help With SendMail Please !
I am quite new to linux.
Sendmail is working perfectly fine when sending to an email address that isnt associated within our company.
For example, an email to a gmail account, it sends fine, but when I test an email to a company email it is never sent.
It isn't getting trapped at the firewall, it doesn't make it that far.
I noticed two things in the maillog it referred to “DSN: Service unavailable” and “dsn=5.0.0, stat=Service unavailable” for the emails that aren't being sent.
Any help would be much appreciated!