Anyone having smtp outgoing mail since Mountain Lion Upgrade?

Then try ports like 25, 465, or 10. Some people have tried 25 and found that it works, but is slow. I tried a few numbers, but 587 is working perfectly for me now. The so-called "Genius" Bar isn't always that bright, it seems. Apple have yet to admit that they have screwed up with this issue. I called O2 and they were unable to help because the problem is Apple's, not O2's. Good luck, Helen.

Again thanks for the help. I have tried all the ports to no avail - infuriating.

I have O2 (Connection Manager) too! Coincidence? Maybe it's an O2 issue.

Had the same issue. Go to the SMTP server settings and uncheck "Use SSL". My system was re-checking it automatically so I had to click on "Use custom port" enter 587 there and uncheck "Use SSL"

Hope this helps.

Did all the above and it worked once before reverting to o2 offline.

You're not alone. I've tried turning off the firewall; rebooting the wireless box; repairing disk permissions, all to no avail.

Hey! I've cracked it. I'm online again. Run the Connection Doctor and then double click on the smtp that has failed to connect (it has the red dot). Then set the port to 25. It seems it is a different setting to the incoming POP server which I've got set to 110.

I'm with Helen. I have tried every solution that has been offered and nothing has worked. Yesterday I was able to use the outgoing server for Gmail. Today none of my outgoing servers will connect.

Helen, I saw one thread that suggested deleting your iCloud account if you have one and then setting it back up in mail making sure to use the same username and password. https://discussions.apple.com/thread/4142071?tstart=0 I may give this a try but frankly I'm getting bored with this BS.

If Apple can't fix it I think they at least owe us an explanation.

Hi Dave

Like Andy Ed, above, I went to the Connection Doctor and changed my port to 25 and it all started working again, or it did until I restart, when it all goes back to nonsense once more. The Connection Doctor routine seems to work all right, but only for a while. On one of the three addresses I use the password had disappeared and still does so after a restart. How tough would it be for Apple to fix this significant problem with Mail or at least tell us how to fix it ourselves?

I agree. A little communication would be nice.

I did delete my iCould account from my mail. Rebooted. Went to system preferences/iCloud and turned mail back on. My mail is working right now. I'm scared I'm going to have to reboot and ruin it.

Also huge dissapointment here.

Tried for days and days to get it fixed but on both machines, macbook air and imac outgoing mails are not working anymore. even icloud does only work from time to time. really really bad!

forced to use google mail now... that's how you get used to the competition :/

Update on my status.

I called Go Daddy a couple of days ago when I saw on one of the post that Apple implied a service provider had not upgraded their servers to work with ML. Go Daddy's response was they didn't know anything about an upgrade.

Mail Connection Doctor showed that I was logged into the server but it would not send mail.

Yesterday morning all of my outgoing mail started to work on all 3 of my computers.

Chance? I think not.

It may be worth a phone call to your provider.

I'm likewise as frustrated and fed up with this problem as everyone else is and my conclusion after tonight is that there's some kind of bug that Apple HAVE to get on the case with - I hope we'll see 10.8.1 issued soon with a fix for this. I'm not convinced that playing around with ports or what-have-you has any kind of real bearing.

My other bugbear is that unsent mail goes into a black hole called "Outbox - On My Mac" which you can only locate if you use the smart folder for "Today", otherwise it just disappears and you've no idea where what's going on with your unsent message(s). Very frustrating. Anyway, that's for another thread.

So. I have Gmail set up in my Mail app and I have 2 other (business) addresses set up, both of which receive via my domain's email servers but send via Gmail, as I manage all mail from Gmail. Tonight I received and replied to several emails, all using a business address but sent via Gmail smtp. But one mail in particular was to my work colleague and just would. not. send: period. All the while I was sending happily from my business address to others. Checking the Connection Doctor from time to time showed either all server connections OK (including both Gmail IMAP and SMTP), or one or other server (could be Gmail, could be another) was not connected. This might change from time to time.

Without making any changes at all my message finally sent (manual send, not an automated re-send), some 3 hours after originally written.

However, I don't seem to have any problems using the Mail app or Gmail app on the iPhone - send and receive no bother. iPhone is set up same as Mac in respect of Mail.

Caveat: I did notice that Gmail sometimes misbehaves in any browser (Safari, Firefox, Chrome - all the same). Sometimes loading the page stalls, other times adding attcchments fails. Again, on the iPhone all works fine. I'm beginning to wonder if Apple and Google have gotten into a rift that they'll draw out. I installed ML Fri 27 July and had Mail working perfectly for the entire weekend - then the nasties started happening with last Monday if I recall correctly.

I give up. I'm frustrated as it's already started screwing up my Gmail filing/archiving, having to send via my domain rather than Gmail.

Besides these niggles, I have to say that Mail is finally working the way I need it to work after several years of waiting; quite impressed otherwise. Though messages flagged in Mail sometimes don't show as starred in Gmail though they do filter as being starred - odd.

I am having the same problem with a handful of email accounts - including gmail, my own kerio mail server and other 3rd party email. The 'offline SMTP server problem' is intermittent - replacing the SMTP server details and trying various suggested fixes works for a short time then stops and starts unpredictably. There really doesn't appear to be any consistency to this behaviour in my own system as for many other users out there.

This began for me with Lion on one or two accounts and has now become much worse since upgrading (?downgrading?) to ML.

I came across this Apple support article, which suggests something similar affecting connections to Exchange servers in Mountain Lion (blaming full support for Autodiscovery), but doesn't really explain why this should happen.

My strong impression from trawling the boards is that there is an unacknowledged issue with Apple Mail and there are no consistent fixes currently available. Apple seems generally reluctant to acknowledge these kinds of problems and often the fixes arrive in an update, with little explanation.

Over the past few weeks now my Mail has (thankfully!) been flawless. I've made no changes at all, my setup is identical in every way to my above post, and all issues seem to have been resolved - I've no idea what happened.

I agree with you in that it's probably an unacknowledged issue with Mail, and doesn't surprise me because it smells of typical Apple, even fixing things on the sly as they do and hope people don't notice and just get on with it being fixed.