I’ve been experiencing freezing and unresponsiveness since installing yesterday. eM Client will work for some time but once I start interacting with it, it will freeze. This seems to occur after heavier use and also happened when it was downloading all my mail for the first time after installation. Killing the MailClient.exe process and restarting does not help; it freezes as soon as I relaunch it. Only a full reboot lets me use the software for a while until it repeats this cycle.
eM Client 10.4.4209 (d96494b)
Windows 11 Pro
Version 25H2
OS build 26200.7462
Windows Feature Experience Pack 1000.26100.275.0
I’ve been experiencing freezing and unresponsiveness since installing yesterday. eM Client will work for some time but once I start interacting with it, it will freeze.
If you have just installed eM Client and it’s freezing and it’s definitely not still synching your account folders, then it might be possibly eg: something running external to the mail client Interferring.
So first “click the dropdown on the right of Refresh” and click Show Operations and dblcheck if there is still anything initially synching. If there is wait till that completed and see if it then works ok.
Now “if there is definitely nothing synching and it’s randomly freezing”, then if you have any eg: optionally installed firewall / security program or optionally installed antivirus program or vpns “other than what comes default with your OS”, then try completely disabling those to test.
Next “If you have nothing optionally installed like that or you do but disabling them made no difference” then if you have a IMAP, Exchange, Office 365 or iCloud account, suggest to “Menu / Accounts” and try removing and readding your account again and see if that fixes it.
If it’s a POP account and you have already downloaded email and it’s no longer on the server, before removing and readding your account, “create a folder on your desktop” called eg: popmail, and “drag all your existing downloaded mail and mail folders into that folder”. Then once you are certain they are all there, remove and readd your POP account again via “Menu / Accounts”.
Then once your POP account has been re-added, “drag your desktop popmail back into the same mail folders” as you had prior to removing then.
Lastly if you have eg: Multiple accounts it might be freezing if you eg: have mail “that might be possibly corrupted within a specific account” so it freezes when it detects it. So if you do have multiple accounts, try adding them “one at a time” to see if it’s a specific account doing it.
I’m not able to show operations as the client is entirely frozen when this occurs. I only have one IMAP account (iCloud).
During troubleshooting I tried running em Client as administrator and enabled all logging. I also deleted a lot of emails. The client has been stable so far, hopefully this has fixed it.
I’m not able to show operations as the client is entirely frozen when this occurs. I only have one IMAP account (iCloud).
Then you might have a database issue, so suggest to next “close eM Client” and go to the following hidden database folder and rename it to eg: eM Client-Old.
(Windows hidden eM Client database folder)
“Users\yourusername\AppData\Roaming\eM Client”
Then uninstall eM Client and go to the release history page and re-download the latest version and reinstall and “setup as new” and see if it still freezes incase it was an installation issue.
If it still freezes then must be something going on either in the OS or with the computer in some way. One reason mail clients can sometimes freeze is eg: if your CPU is overclocked, so make sure that’s at normal speed if it is overclocked.
If your CPU is not overclocked, then I would next eg: disable all non OS user related optional programs on Windows startup and reboot to rule out any startup program interference. You can google how to do that if you don’t know.
Lastly sometimes programs can lock up if you eg: have outdated motherboard or videos drivers or outdated firmware etc. So make sure all your Windows driver’s & firmware etc is up to date.
Thanks for the info. I think I may have fixed the issue by disabling the GPU for eM Client. It has been running for a few days now with no issues.
For anyone having a similar issue, in Windows 11 go to System > Display > Graphics, create a custom setting for MailClient.exe (the default path is C:\Program Files (x86)\eM Client) and choose power saving for the GPU preference.
I also began to experience screen issues when waking the display from sleep where the login prompt would not show and the taskbar was busy after I managed to login. This seemed to occur when eM Client was left running. After some searching it seemed to be video driver related and I recently updated to the latest drivers, so I think there is an issue with the current version.
Thanks @AgileAntelope - I was experiencing the same eM Client freezes where I’d have to end task constantly, with all of the identical versions/updates that you listed. While it hasn’t been that long yet after making the GPU preference adjustment, eM Client normally would have locked up my PC by now.
I started to experience the freezes again. I uninstalled / reinstalled eM Client yesterday and used a new database. It froze while I left it running overnight. When I restart it reports database issues and fixes them. Not sure that to do at this point except wait until there are driver / windows / eM Client updates and hope something will fix this issue. I’m running a stock Dell desktop, no overclocking or anything out of the ordinary.
Joined the forum here because I am having the same problem. eMclient just freezes so I have to force shut it down from taskmanager.
I have an imap account and a office365 accout synced within the boundaries of the free accound.
AgileAnteloope thanks for the suggestion messing around with GPU settings in regards to an email client, I see you report that it did not work. These types of manual fixes should not be neccesary either.
Hoping for a fix, devs please reach out if you need info from my end.
eMC ver: 10.4.4209 (Pro Lifetime}
Edition Windows 11 Pro
Version 25H2
Installed on 13/?06/?2025
OS build 26200.7623
Serial number 5N800M
Experience Windows Feature Experience Pack 1000.26100.275.0
I have been using eMC for over 6 years and currently have 4 installations
all with Win 11 pro the detail as above.
All have high performance CPU’s, minimum of 32Gb RAM (2 with DDR5)
and partitioned 2X 1Gb 2280 SSD (total 2Gb).
I run IMAP & POP concurrently across all PC’s with variations of Exchange
and Office 365. I receive approx 350 emails per day and send about 50.
I run on mail server anti-Spam software, Windows Defender, Malwarebytes
and Surfshark VPN. Integrated with eMC is Nuance Power PDF Advanced,
and Corel Paint Shop Pro 2023 Ultimate.
eMC is configured to run with a high reliance on Rules to Tag & Sort all
mail to specific folders with Automatic Archive every 7 ays.
The bottom line is that I have NEVER experienced freezing with eMC.
Further I am aware that, evidenced by comments on this Forum, that many
installations run eMC with several thousands of messages stored in the Inbox
and believe this to be the cause of issues, not because eMC can’t cope, but
because the demand on the system can’t meet the needs of eMC.
Just a thought for which I will no doubt be criticised.
skybat
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¡Mis mejores deseos y mantente a salvo!
I just switched to using Outlook. Runs without any freezing issues with the same email account I was using in eM Client. I really wanted to use eM Client but I don’t really have time to troubleshoot and play with settings. All of the other software I use on my computer works without issue as well.
Im having the exact same problem, i’m having to force kill using task manager a couple times a day now. Ive tryed the GPU fix, re-installing and its the same issue.
I cant imagine its my mailbox as it works completely fine in Outlook.
My eMC (free version) stopped working today, it would not send or receive to my email accounts (2). I uninstalled and reinstalled eMC v10.4.4209, now it will not authorise my accounts.
This is the error message: “There was error obtaining credentials via OAuth.” I have been here for 3.5 hrs trying to fix the problem and getting nowhere.
Can somebody please put me out of my misery, before I do.
Close eM Client and go online to your mail accounts and “remove the eM Client OAuth tokens. Then reopen eM Client and it should popup a window to reauthorise your accounts.
If it still won’t authorize and you have IMAP, Exchange, Office 365 or iCloud account and nothing in Local Folders, then go to “Menu / Accounts” and remove and readd your accounts.
Or alternatively if you have been making regular eM Client backups, then go to “Menu / File / Restore” and restore a recent dated backup when you know it was working ok. Any new emails since the restore point will then update when eM Client reconnects.
Hi cyberzork, first and foremost, Thanks for your reply.
I don’t know what has happened.
I tried 2 x system restores and they both failed because of my antivirus program ESET Smart Security Premium. I tried one late last night and one 30 mins ago, so I gave up. I then opened eMClient and tried adding one of my 2 accounts… Bingo! it installed, so I then added the 2nd account.
I now want to try and restore a backup, does it matter if the backup is in a .rar folder or does it need to be extracted into a folder first?
I want to get my folders back to the way they were before all this trouble, I am lost without my eMClient for emails even if I can get to them via my browser. I just prefer to use eMClient.
I now want to try and restore a backup, does it matter if the backup is in a .rar folder or does it need to be extracted into a folder first?
If you have eM Client dated backup.zip files in your .rar file, or the eM Client hidden database folder backed up inside your .rar file then you can do a partial restore to restore measages.
See my post on the following thread how to do a partial restore from either of the above.
Renamed the current eM Client folder to eM Client.old.
Extracted the contents of the .rar file.
Copied the entire extracted folder (with all .dat files and subfolders) into the
C:\Users<your user>\AppData\Roaming to a newly created eM Client folder.
Ensuring the folder name was exactly the same: eM Client
Then I started eM Client.
It automatically loaded every .dat file — no manual importing.
Viola! so far so good. I will keep the eM Client.old folder for a few days to make certain everything is back working as it should.
