Very slow IMAP performance - testing before buying

Been using eMclient for about a week now.  Moving from thunderbird, and testing them side by side.  Using all IMAP, and already set for local offline content.  Also have 200mbit connection, so no problems there.  And a very (!) fast machine with plenty of memory as well.

eMclient will sit and spin (presumably updating) its little circly thing all day.  Thunderbird will receive messages instantly, but eMclient will not, if ever receive the same message.   I have to shut down eMclient and restart for it to resync.  I attached a picture of the spinning circle.  It never stops

My whole setup is plain and default. I like eMclient calendar integration and clean layout so far, but its proving pretty unreliable in my early usage as an email client unfortunately.  Don’t mind paying at all (6 copies), but it needs to be consistent and reliable.

Any thoughts would be helpful.   I can turn on debugging if need be as well.


If there is some issue with the database, it might be worth deleting it and starting again. To delete the database, close eM Client, and then delete or rename C:\Users_[username]_\AppData\Roaming\eM Client. You may have to show hidden items in Explorer to do that.

You can also check that you have the correct IMAP settings in Menu > Tools > Accounts. The port should be 993 and the security policy should be Use SSL/TLS on special port (legacy).

Thanks so much for your reply.  I’ve deleted the database a few times.  Also, the IMAP settings are as you suggest.  I guess I can delete the database again.   It just happened again, there was about a 15 minute delay between thunderbird receiving an email and eMclient.  I also have the fetch interval set to 1 minute as well.   Kind of baffling.

The synchronization interval does not affect IMAP accounts. It only applies to POP3 accounts, and to calendars and contacts that are synced with a server. Maybe put that to a higher value, like at least 10 minutes. With Google accounts, it will not help to use anything less than 15 minutes, as the application code will reject any sync action until 15 minutes has passed.

eM Client uses IDLE IMAP, which means that the server will send a notification when the online folder changes. That means that your email should arrive immediately it is received by the server.

Cool, didn’t know that!  Makes sense.  Did the database folder delete, its resyncing now.  Will watch it during the next few days.  Thanks SO much for your replies.

Decided to move away from thunderbird because of terrible “send” mail performance and timeouts constantly.   eMclient has terrific send performance!!  I’ll keep fiddling with it to get my “received mail” performance to be consistent.  I have IMAP logging turned on and will take a look if it gets bogged down.