Q: Mail not working after update OS X 10.10.4 and IOS 8.4

Me too, Peterfromlouth.

However, there is something to ALL of these suggested fixes, part or a combination thereof, You can see what I did above. Mine is cured and the mailbox order switching has stopped too. The fact that the comments are starting to repeat, suggest that the number of solutions has peaked. Read them all again. On will sort you out.

Some friends of mine have had the same, others not. Interestingly, those with only one IMAP email account did not get this problem.

Before I fixed mine, there was a five minute period when mine was ok. Oddly, just after deleting one small mailbox, all three IMAPs started working. Then it went back to two. Gmail had a hand in this too, in my view. see my Google support link and the bit about waiting to 20 mins.

Apple mail is not great, and one day they may even fix the bog "send while spell check is part way through error", but it does work.

Lets hope Apple technical reads all of these.

Tony

I deleted the MailAccounts.plist. This seems to have fixed the issue. Mail showed no messages in any accounts an froze up before I deleted the plist. This happened after the update on 7/10/2015 10.10.4 Yosemite.

I am having the same issue, Mail freezes. Sometimes it reads my iCloud inbox but nothing else. When I select another mailbox nothing happens. Started after I upgraded to 10.10.4 yesterday.

Where did you locate this file MailAccounts.plist ? I searched and could not find it.

I restarted Mail three times, now everything is working properly. I am beginning to think its not mail.

I found the file in my Library\application support\mail. After removing it, the system did not create a new one. I'm thinking it came from Maverick or even older.

This worked only once. I just went into mail and it froze 3 more times. Each time I sent a report. I'm hoping Apple fixes this soon.

It didn't work. My mail still froze 3 more times. In Console, here is the message I see:

7/11/15 1:43:34.675 PM Mail[1775]: dnssd_clientstub DNSServiceProcessResult called with DNSServiceRef with no ProcessReply function

yes, i'm still having the same problem. 4 out of 5 times i boot the mail program, NONE of the emails show up in any of the folders.

shutting down only works with Force Quit, and then I don't even get a 'report to Apple bug' option anymore.

Same problem. This worked for me:

I first (and successfully) tried re-indexing the mailboxes. It took about 10min for 100,000 messages.

Reindex messages

• Quit Mail if it’s open.
• In ~/Library/Mail/V2/MailData, delete any file that begins with “Envelope Index,” such as Envelope Index or Envelope Index-shm.Your home Library folder is hidden by default. To display it, choose Finder > “Go to Folder” and then enter “~/Library.”
• Open Mail.Mail creates new Envelope Index files. This process may take a few minutes, depending on how many messages Mail is reindexing.

Had that not worked, I was going to rebuild the mailbox.

Rebuild mailbox

I rebuilt the mailbox and also removed the indices. However, I always check Console for this message "

dnssd_clientstub DNSServiceProcessResult called with DNSServiceRef with no ProcessReply function". If the time is current, I start Mail and it freezes every time. If that message is not in Console, I can use mail normally. So, it's still freezing and it has nothing to do with plists, indices, or rebuilding the mailboxes. Apple has to write another patch for this error. They broke something on the 10.10.4 update.

This fixed the issue.. thanks for the help. its always like this. update 1 thing and break 5 more...

So when one used gmail based servers like Google Apps and major email/domain providers like 1and1, this sort of implementation has already been addressed.

Am I correct in presuming that the solution you discuss is applicable to individuals and companies that operate their own servers?

That console message was a red herring. The problem was smtp settings were messed up after applying the 10.10.4 update to yosemite. I checked each of my mail accounts and corrected any that got hosed. Now mail is working again consistently. You have to go into advanced settings on each mail account to check/correct the information.

I have a Go Daddy POP email account that stopped working with the upgrade to 10.10.4.  Spend the better, part of a full day with AppleCare, tried everything we could think of, including trying to restore from Time Machine (which told me the backup was too large for my drive, which is an issue for another thread).  I can still access the email from my iphone and ipad, but not the Mac, which makes me believe it's the OS and not Go Daddy.  I've tried accessing from Mail, Outlook and Thunderbird, but it keeps rejecting my username and password (and yes, I checked the password, and can still login from my webmail).  I'm honestly at a complete loss.