Thanks Mathew for the response.
I’ve double checked the information I put in the settings and all are correct. I wanted to just change just the email address and password.
This works if I use their webmail system, so I know the username and password are correct.
Before I made the change it was working.
My hosting is webhosting.uk.com and their server info is:
Port: 587 (They say use 465 but that originally failed)
Host Name: gillingham.redbackinternet.net
Username: billing@ultraview.net
password: xxxxxx
send activation to steveg@ultraview.net
What are your IP address and I’ll check with then to see if your IPs are blocked
Steve