IMAP Accounts Won't Login

I have the smilier problem: IMAP and wifi printer connection

Dec 13, 2015 4:01 AM Re: IMAP Accounts Won't Login
in response to 750 H2C

Yes, there is another type of traffic affected. I have an Ethernet printer connected to my Airport Extreme, which means that I'm sending print jobs wirelessly to the AE. When the IMAP connection is down, my printer connection is also lost. Which gives me three symptoms:

1. IMAP goes down.
2. Airplay interrupts.
3. Printing goes down

Have you found a solution?

I am having a similar problem with my Apple mail. All other accounts connect fine. My Apple account does not. Here is what I get

What does this mean exactly. I can't find anywhere what i need to change. This happened right after upgrading to El Capitan.

lori_diloreto wrote:

I am having a similar problem with my Apple mail. All other accounts connect fine. My Apple account does not. Here is what I get

What does this mean exactly. I can't find anywhere what i need to change. This happened right after upgrading to El Capitan.

I have exactly the same problem. I have two IMAP accounts, and both work just fine for outgoing (SMTP) traffic, but suddenly after installing El Capitan, Mail was unable to connect to my incoming (IMAP) servers. Both of them, one of which is an iCloud account. My Mail Connection Doctor looked just like yours, but with two red dots, one for each IMAP account.

I opened a support case with Apple, and they did some detective work, but once we got to the standard hard-resetting of my Airport Extreme just to rule it out, the problem vanished. Everybody happy, case closed. However, after two weeks it was back. And now I get the problem once or twice each day. Very annoying.

In parallel, I've gotten problems with Airplay. I have a setup streaming music from my iTunes library to an Airplay-enabled stereo over my Airport network. This setup has worked for almost a year before El Capitan, but now I get interruptions in the playback, for typically ten seconds or so. iTunes is not the culprit: it keeps playing, so when the music comes back after a break, it'll start from the point where it should have been without the interruption. Something in the network seems to be fishy.

I assume these two problems to be correlated, since they showed up at exactly the same time, just after my installation of El Capitan. To me, this smells like some networking bug affecting both IMAP and Airplay traffic. And maybe other types of traffic too.

David's solutions helped me figure out mine.

I fixed the problem this morning. I did a few small things, not sure which was most important.

1. I opened my iPad and looked at the smtp settings for the account, and quickly realized that el Capitan had totally scrambled some of these things. The server was wrong, so I typed in the correct smtp server
2. The smtp port number was wrong, so I changed that. No idea if that was important
3. and last night, I had noticed that the outgoing password field was blank, so I had filled that in

So probably the biggest issue was the wrong smtp server. It was from an old email service that I used with the same email address.

If you have a iPhone or iPad, copy those settings over to your Mac. Hope this helps others. Fingers crossed for you. Not having email really bites it.

Yes, there is another type of traffic affected. I have an Ethernet printer connected to my Airport Extreme, which means that I'm sending print jobs wirelessly to the AE. When the IMAP connection is down, my printer connection is also lost. Which gives me three symptoms:

1. IMAP goes down.
2. Airplay interrupts.
3. Printing goes down.

I had similar problems, on top of excessive data usage by OS X Mail since the update to El Capitan. I'd like to add my findings, hoping they might help others:

1. (Indeed) check all mail account settings and verify them with your provider. I found out one of the settings had to be changed because the provider had changed them without notifying me..
2. If this doesn't help, do the check at the top of this page: http://www.needhelp4mac.com/2015/10/troubleshooting-apple-mail-in-os-x-10-11-el- capitan/

very similar problem here, but it only affects my outgoing smtp servers. All are offline, can't get them back online. Dropped my passwords, but I reentered one and it still didn't help. Just stuck on offline.

I Am not sure and how to go about fixing my problem. All my other accounts, gmail, yahoo, Att are fine. It is my apple IMAP part that won't connect. The SMTP part connects. I really don't know where to go to change settings or even what to look for. I have everything in the cloud and synced with my iPad. I noticed I am having problems with the Notes app. It is not connecting or syncing, it just has a spinning ball next to my email address in the top left column. Every time I tried to do a change or delete something it don't work.

I'm having exactly the same issue with my hosting provider. Gmail works great, but IMAP from my own providers no longer works. I'm sure that my account password and user ID are correct, but still it is not able to use the account.

I experience this peculiar problem as well with my only IMAP account (yahoo) - I have not been able to reset to POP3 mail when I upgraded from OS X 10.6.8 to Maverick, and I also encounter it on a newly bought MB Air. Tried to verify all server addresses and ports, but to no avail.

All other POP3 accounts do well but I had some - since disappeared - problems on some of those when I updated to 10.11.2 last weekend.

rms000 wrote:

Have you found a solution?

No, but after 10.11.3 or 10.11.4 I haven't had any of these problems. Instead, I've started having recurring problems with Messages and FaceTime. A couple of support cases led me to discarding some plist files, after which things have been better, but now and again I find myself having strange network problems related to specific functions. El C (or my new MBP) seems to be rotting from the inside.

I too am having similar problems with Mail. I have tried various fixes with no success. I agree with above.

Hard-resetting the Airport Extreme no longer seems to be a useful remedy.

After upgrading to 10.11.2, my problems disappeared. For a while. Now they're back. Just as when I upgraded to 10.11.1. Seems like something's deteriorating.