After upgrading to Mountain Lion I experienced the inability to connect to the O2 smtp servers and was unable to send mail via my O2 account. This was remedied by editing the O2 smtp and hard coding port 25 in the 'Use Custom Port' in the advanced tap
iMac (27-inch Late 2009), OS X Mountain Lion
Thanks John,
Tried this but still does not work for me. Lets hope there is a solution soon.
Geoff
PS by the way my new mail does not now have the use default option?
Are you using O2? The fix worked on both my iMac and Macbook Air and also a friends iMac who I helped upgrade to Mountain Lion - all using O2 mail - I also had to hard code my Hotmail to port 587 to make that work.
Anyhows Apple & O2 tech support have no ideas. I told them what to do!
John
Hi,
sorry it does work but I had forgotten to put mail back online. Many thanks
Geoff
John,
The port 25 solution worked fine for me, for sending, on an iMac 24" (late 2008) and a late 2009 mini, both running Mountain Lion but I had to do a restart on each machine to get the final "Connection to Server".
Interestingly, Mail on the iPhone and iPad has survived all the iOS updates without problem.
Thanks for the idea.
clandy
yep my iPhone & iPad survived IOS updates as well - lets see what happens tomorrow with the release of IOS6!
John
I experienced exactly the same issue. If you have already tried to unsuccessfully setup your mail on your Mac, then the outgoing SMTP server details that the automatic detection process captured will remain in the list of available outgoing servers within mail preferences. You need to delete these for good measure. In my experience, the Mail application tried to cycle through previous instances of these servers from the list of outgoing SMTP servers and this just compounded issues when trying to resolve my configuration.
And so on to the settings that worked for me. The following changes to my POP3 mail settings for o2 are:
Logon information:
Incoming Server
Outgoing Server
I hope this helps.
Your note proved most welcome though my first thought on receiving it was to "leave well alone". All accounts (2-o2 and 1-Gmail) were working fine, in and out and then yesterday after being ok in the morning, the 2 -o2 accounts developed an inability to send from the iMac. (Those on the Mac Mini continued faultlessly.) The connection Doctor showed all green lights but still I could not send. Checked passwords, user names but no progress.
Took your point about deleting servers but not being sure how to be sure of this I simply deleted all (both) my o2 accounts completely and started again after restarting the computer.
Maintained your (and my own previous) port settings and password authentications but, after a failed attempt, used smtp.o2.co.uk (which had usually worked for me in the past) for the outgoing server rather than your mail.o2.co.uk.
Interestingly, at each stage of the setting up of the new account, I kept getting warning notices such as "Logging in to the O2 UK POP server failed. Etc....... - you cannot receive messages" but was nevertheless encouraged to continue. Finally after pressing the "Create" button all my messages came streaming in. But I still could not send. Connection Doc showed "..... no connection to SMTP server."
So, as a last resort I quit Mail and restarted the computer and all was well - full set of green lights and all accounts sending and receiving.
So I am a little more familiar with what is needed but harbour some questions about some of the warnings received in the setting up process about insecure passwords.
Thank you for your comments.
Clandy
o2 mail sending problem after upgrading to Mountain Lion
