~]$ host smtp.three.co.uk
smtp.three.co.uk is an alias for smtp.office365.com.
"Proper" ISPs normally have SMTP servers that is reachable for their customers (don't need a full blown e-mail service anyway as I have my own domain name). Looks as if 3 haven't bothered providing a SMTP server as most of their customers probably use mail apps.3 as an ISP don't offer email like with BT etc. Best use a free one and use their smtp server to connect to.
I just got a £1 VPS from 1&1 (IONOS). Only 1 CPU, 512 MB RAM, but perfect as VPN and SMTP server."Proper" ISPs normally have SMTP servers that is reachable for their customers (don't need a full blown e-mail service anyway as I have my own domain name). Looks as if 3 haven't bothered providing a SMTP server as most of their customers probably use mail apps.
So, I just signed up with smtp2go where you can send 1000 e-mails per month for free. Had some minor issues but excellent online chat support.
"Proper" ISPs normally have SMTP servers that is reachable for their customers