The genral point of this post is to let you guy's know the general settings we use for Office 365 such as servers, port numbers and security settings. In addition to that, I will be placing links to BT Help and Support Articles on how to modify or setup your mail cleints for this service.
General Settings:
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POP3 settings:-
Server name: pop.outlook.com
Port: 995
Encryption method: SSL
SMTP settings:-
Server name: smtp.outlook.com
Port: 587
Encryption method: TLS (or SSL if client does not give option for TLS)
Additional Info:-
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Although not listed in set up the mail only appears to work correctly if you enable SMTP authentication and tell it to log on using same settings as incoming server
POP = Incoming
SMTP = Outgoing
Mail Client Guides:
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Setting up an Office 365 POP email account in Outlook 2003
Setting up an Office 365 POP email account in Outlook 2007
Setting up an Office 365 POP email account in Outlook 2010
Setting up an Office 365 POP email account in Apple Mac Mail
Setting up an Office 365 POP email account in Mozilla Thunderbird
I hope these details help anyone with setting things up!!!!!
Update - Thunderbird may have an issue where even though port 587 shows as default there may be cases where it actually tries to connect to port 465.
To resolve this go into Preferences>Account Settings> "Outgoing Server (SMTP)".
If you see 2 entries please remove the entry for port 465.