I have a Win2003 Server running Plesk - I know this sounds strange and laot wont believe me... but...
I was getting email just fine up until a day or 2 ago... but I havent changed anything on the server or on my PC since then. Im assuming its a client side error with OutLook (thats what Im using as my mail client)
Error : 503 This mail server requires authentication. Please check your mail client settings.
- But my mail client has changed at all.
Ive tried clicking the 'outgoing server (SMTP) requires authentication' but that hasnt changed anything.
I do still receive the mail and can see it when I log into my account via webmail but its kinda frustrating.