Happening to me too - tried renaming the database file (as per an old forum post) - but still happening. Based in the uk.
MW Pro 7.12.173
An unknown error has occurred. MailWasher is unable to determine the cause of this error.
- dukeofdarkness
- It begins with a single step
- Atratus
- Mystified Moa
Post
I tried a fresh install on a brand new Windows System: It's erroring too:
viewtopic.php?f=50&t=58513&p=168331#p168331
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
It's not depending on windows or your datebase.dukeofdarkness wrote: ↑Tue Nov 14, 2023 4:22 amHappening to me too - tried renaming the database file (as per an old forum post) - but still happening. Based in the uk.
MW Pro 7.12.173
I tried a fresh install on a brand new Windows System: It's erroring too:
viewtopic.php?f=50&t=58513&p=168331#p168331
- foz
- It begins with a single step
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Same problem here, W11 Pro - 22H2 Issue only started today, was fine Friday. MW: 7.12.173
- Cooz
- Mystified Moa
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
I'm glad that it's not only me.
I'll wait for the fix...
I'll wait for the fix...
- anyoneinracks
- Mystified Moa
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Me too just Win 10. Mobile working fine.
- cvalde
- Mystified Moa
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
FT says it only happens in Win11. It's the same problem in Win10.
- ATCtech
- Student Sheep
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Version 7.12.187 is working 100% for me on two Windows 10 machines. Scary stuff yesterday when both MWP installations quit, one on a computer that hadn't even been powered on in the 30 hours prior.
- Antispamneophyte
- Rattled Rabbit
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Hello, newbie here.
This problem started for me yesterday morning, November 12, on my Windows 10 desktop and laptop machines, and it worked fine the day before on both machines.
As someone else said, it seems like Firetrust would want to come up with a fix as quickly as possible, so that new users don't get a bad impression.
I'm really missing this app, but will randomly check for updates to my .173 rather than diddle with any more software or settings.
This problem started for me yesterday morning, November 12, on my Windows 10 desktop and laptop machines, and it worked fine the day before on both machines.
As someone else said, it seems like Firetrust would want to come up with a fix as quickly as possible, so that new users don't get a bad impression.
I'm really missing this app, but will randomly check for updates to my .173 rather than diddle with any more software or settings.
Jeff
- Supake
- Mystified Moa
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Given that it's now an obvious and established issue, Firetrust, can you post a 'Top of Topic Sticky' so people don't have to wade through the fluff to find out what's going on.
Also, it wil be easier to check that you have sorted the problem (SSL Cert issue with Dates?) and that your customers can start yo update safely again
Cheers
Starb
Also, it wil be easier to check that you have sorted the problem (SSL Cert issue with Dates?) and that your customers can start yo update safely again

Cheers
Starb
- Rover
- Student Sheep
Post
As described by others , and FT themselves within the forum. As seen in post at viewtopic.php?f=16&t=58538
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
I would like to know where that version came from, even the first post of it with a link. I'm still going to wait for some form of official release or announcement , as rolling back to 7.12.125 worked for me, with no loss in settings etc.
As described by others , and FT themselves within the forum. As seen in post at viewtopic.php?f=16&t=58538
- trois
- Student Sheep
Post
V187 is on the MW CDN, so I 'assume' (I know, always tricky) it is secure - probably a beta (not indicated as such), but it is running smooth.
EDIT: available here (but not within MW itself, as v173 said it was up to date): https://www.softexia.com/internet/emai ... mailwasher
For backing up MW:
1: under 'File' (menu), there is an 'export'-function
2: there is/was a backup tool: mailwasherpro.de (site is down - I happen to have an 'old' version (maybe the last one, as it is not maintained any longer))
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
I updated my post - reg cleaner might (!) delete too much (some custom settings), but it has never corrupted my registry - anyway, that is not the issue here.
V187 is on the MW CDN, so I 'assume' (I know, always tricky) it is secure - probably a beta (not indicated as such), but it is running smooth.
EDIT: available here (but not within MW itself, as v173 said it was up to date): https://www.softexia.com/internet/emai ... mailwasher
For backing up MW:
1: under 'File' (menu), there is an 'export'-function
2: there is/was a backup tool: mailwasherpro.de (site is down - I happen to have an 'old' version (maybe the last one, as it is not maintained any longer))
- rosamundi
- Rattled Rabbit
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
That was the last weekend in October, so I doubt it.scouseware1 wrote: ↑Tue Nov 14, 2023 12:39 amAlso I wonder if this is related to the recent British Summertime Change in Clock time in the UK
- ataraxy
- Knowledgeable Kea
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Latest announcement from Firetrust: viewtopic.php?f=16&t=58538&p=168390#p168390
Windows 10
- TikiG2
- It begins with a single step
Post
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Same issue version 7.12.173, Windows 11Pro, US. I haven't read all of the posts, but did want to mention that I also noticed that the recycle bin contents are now missing as well.
Hopefully we get a fix soon.
Hopefully we get a fix soon.
- David_R
- Rattled Rabbit
Post
So until Firetrust release a fix/new version of MailWasher Pro I will continue with ThunderBirds email spam measures enabled.
Re: An unknown error has occurred. MailWasher is unable to determine the cause of this error.
Thanks for that, fortunately that is still there.Atratus wrote: ↑Tue Nov 14, 2023 3:13 amThe last CURRENT VERSION is 7.12.173trois wrote: ↑Tue Nov 14, 2023 3:07 amJust clean your registry (Wise Registry or CCleaner have portable versions), then install MW187 - enable FA - it runs fine (now) on both my Win 10 PC's.David_R wrote: ↑Tue Nov 14, 2023 2:41 am
Didn't we have all of the problems with this .173 version:
viewtopic.php?f=50&t=58384&start=45
We had to disable something 'First Alert' or MailWasher just shutdown.
Unfortunately for me I have completely uninstalled MWP (angry) and lost the lifetime licence data/info (and confidence in the product). So I don't know if I will bother after this latest cockup and just try Thunderbirds AntiSpam measures..
Contact MW support (from your registered email address and register the app again). Yes, 173 is a misfiretrust - their support is always fast (and friendly), they will help you out (though I'm wondering why they are (too) silent lately - with MW-updates and replies on this board).
MW187 is not the latest.
Don't use reg cleaner. It will just corrupt your reg
Your Reg informations are stored in a file called: key.file
It's located in c:\ProgramData\Firetrust\MailWasher
So until Firetrust release a fix/new version of MailWasher Pro I will continue with ThunderBirds email spam measures enabled.