I've been trying for ages to get this to work.
This page https://www.plus.net/help/email-guides/how-to-set-up-plusnet-email/ says
What other settings do I need?
You'll need to give a few more details when you're setting up your email application. They can be pretty confusing, so here's what to use.
IMAP POP
| Incoming server | imap.plus.net | mail.plus.net |
| Incoming port | 993 | 995 |
| Outgoing server | relay.plus.net | relay.plus.net |
| Outgoing port | 587 (recommended) or 25 | 587 (recommended) or 25 |
| STARTTLS | Yes | Yes |
| SMTP Authentication (only needed if you're sending emails from a non-Plusnet Internet connection)* | Yes | Yes |
* This is only available if you've got an active Plusnet broadband account
If your client doesn't support STARTTLS, then you can set SSL/TLS to Yes and set the outgoing port to 465.
If you've been with us a while, your domain might be '.force9.co.uk or '.free-online.net'. If so, change '.plus.net' to '.force9.net' or '.free-online.net' for both your incoming and outgoing servers.
When I try to set things up in my outlook android client, I find that I need to choose SSL/TLS and use port 465 as above.
Additionally, despite needing to use my username in the format of bbaccount+email elsewhere, that does not work for the IMAP and RELAY usernames. Instead, I must use email@bbaccount.plus.com
Hope this save someone else some time.
