Sierra Mail Slow

same issue here. 2015 MacBook pro. searching, viewing, doing much of anything with mail...painful.

Same performance problem here! Hopefully this gets fixed soon!!

I agree. Mail is very slow (minutes) to open/render a digitally signed or encrypted (S/MIME) message. Once open, a "Reply" takes as long or longer to render a usable edit window. I've lost ability to encrypt within that window (signing seems OK?) and the reply text/message is missing in the reply window.

Yes same experience, the S/MIME seems to be a common thread for me. Other messages seem to load reasonably well. It may not be the only issue, but there is certainly an issue w/ S/MIME messages.

I haven't seen any response here from Apple other than "Rebuild" which does nothing to fix the issues noted w/SMIME. Is this issue at least noted by the Apple team? Is there some plan or timeline for resolution?

I have a helpdesk ticket open and have filed a bug report. I don't expect either to be dealt with any time soon.

(edit)

To be clear - the bug report has to do with mail import from time machine, which I think is related to the s/mime issue.

The helpdesk report is for the actual opening/sending of digitally signed email which falls in line with s/mime.

Finally I had to open a new Admin account and install all apps there... it got better... nearly as pre-Sierra. Really disappointed by Apple. Hope this was the last time something like this happened!!

I did the same thing - with a nuke. I completely reinstalled the OS, did not restore anything but data using time machine, reinstalled the apps, etc... It degraded anyway - maybe after I imported my email, maybe after I started using my smart card for email sigs, dunno. Just know that it degraded anyway.

for me, the common denominator is extremely slow Load times of messages that are digitally signed or encrypted

are others able to confirm?

I have exactly the same problem, have attempted the same solution !!! NO help. Very fustrating

I am having the same problem. Rebuild does nothing. Deleting a large Archive did not help. I also have tried disconnecting each account. WiFi from a Time Machine router is fast. It takes several seconds to load a new email when the current email note is deleted. I am reading my email with iOS devices rather than my 2.8 GHz MacBook Pro Retina mid-2014. I guess I will file a ticket with Apple Support.

Ken

Hi Ken,

I tried to file a ticket with Apple Support - they said that I must be Microsoft causing the issue. I tried to get details but of course even 2. line support was not able to provide more insights. Hope you´re more lucky than me.

Michael

Hi Michael, you might not like my answer. I formatted the whole HD and reinstalled El Capitan. Reinstalled my files from the back-up and downloaded and configured all applications. Then I migrated again to Sierra. Nothing really changed. Two days later - and out of the blue - everything went back to run smooth as it did under El Capitan. So, I really do not know, what caused the improvement, eventually. I hope you will get your system up and running as you were used to, too. Best regards, Corrado

I´m at last luck that it´s working on your end ;-) I did a clean install to without restoring anything from time machine. Curious to know if you are also using Exchange Accounts and GMAIL?

Thanks

Michael

I am still struggling on this, been running half my mail accounts on outlook and the other half on google web interface.... still mail is crawling.

One of my collegues is suffering the same problem, surely Apple should do something about this