OK first some information: My primary domain is geoffvalenti.x10.mx I created a domain geoffvalenti.co.uk to host my website. The website functions as it should and I can upload changes via ftp. I've got 2 email accounts firstname.lastname@example.org (which works OK) email@example.com (which worked until migration) The address firstname.lastname@example.org uk will not send any mail, and only receives mail that I send as tests from the x10.mx address. No other account can send it mail. I need this account as it's been given to people as a contact address. I've tried everything that I know. I've followed the details for account servers but nothing seems to work For info, I'm using the settings SMTP server name = mail.geoffvalenti.co.uk Port 587 Connection security SSL/TLS IMAP server = mail.geoffvalenti.co.uk Port 993 Connection security STARTTLS Password same one as webmail (which gets me into the account) I'd be grateful of some help here.