Community Discussions and Support

The perfect forum for general discussions or technical questions about Mercury Mail Server.


I migrate from version 4.80 on March 19. (Windows Server 2012 R2). No problems occurred during and after the migration.
For one week I get the following error message in the System log :
The Mercury32 service terminated unexpectedy. It has done this 1 time(s). The following corrective action will be taken in 60000 milliseconds: Restart the service.
The Mercury32 service is restarted either directly by the system or by the Zabbix monitoring system.
The problem is that each time Mercury32 is restarted, a new instance of the clamd.exe process is created and each instance takes 1 Gb of memory.
The only information I can find in the log is the Windows Event ID (7031). Does somebody know where I can find some more information to track the problem ?.
Many thanks for your help

recent by Joerg  ·  Jan 5 '23 at 8:54 am

Hi Rolf,
What are the state of affairs regarding Mercury v5? All in time? smile

At the moment I have to create lots of new user accounts which will be accessed by Roundcube via IMAP. ... and what's annoying me again and again is the limitation to 8 digits for a local user name. Hopefully you got this on your list.


recent by Invictus  ·  Jan 3 '23 at 2:45 pm
Joerg posted Dec 21 '22 at 3:02 pm

Within Pmail you can create additional subfolders for existing folders of a mailbox. And once these "folders in folders" have been created in Pmail, they are also visible and usable without problems via IMAP in Thunderbird when you connect to this mailbox.
But unfortunately the direct creation of these subfolders (folders in folders) in Thunderbird is not possible, although in Thunderbird settings "IMAP Server supports Folders in Folders" is checked.

Has anybody a hint in this regard?
Does Mercury 4.91 better supports "folder in folder"?

recent by Invictus  ·  Jan 3 '23 at 1:30 pm
Invictus posted Dec 28 '22 at 12:14 pm

Hello - we've been using Mercury for some decades now & find it an excellent server - every day's a school day. I was wondering if anyone out there used an email security package with Mercury - some crap will always get through but I'd like to be as tight as poss without losing too much performance. We use the pop3 client to download from 2 wildcard accounts & distribute to users via imap [Tbird Outlook roundcube etc] or using integrated Pegasus.
Any ideas appreciated - looking out in the wild it seems everyone's trying to push to Google or Microsoft....which I don't want to do.

Invictus posted Dec 29 '22 at 4:04 pm

Has anyone successfully set up MLSS on MercuryB Http.
All seems in order - I just keep getting 404 error.
I do have Mercury webtools working over http.
Any insight appreciated.



we have every now and than problems with POP3 fetch. The Mercury POP3 client prints out:
"TCP/IP communication error Network error: delivering anyway"
and gets no other mails after the (mostly spam, often with attachment) mail. We have to delete the mail via WebMail Client and then Mercury gets back to work.

Is there anything we can do? Is there anything known?


kgw posted Nov 15 '22 at 4:49 pm

Is anyone else seeing this? New licensed installation of Mercury installed on Windows Serer 2016, Mercury/32 version: Mercury/32, v4.91.349, 23 Sep 2022

I have set the service set to restart, which it does, but users report disconnections. No other Windows services are reporting this problem.

Any ideas what to do about it?

Log Name: System
Source: Service Control Manager
Date: 11/15/2022 8:02:56 AM
Event ID: 7031
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: -----------------------
The Mercury32 service terminated unexpectedly. It has done this 294 time(s). The following corrective action will be taken in 60000 milliseconds: Restart the service.

recent by kgw  ·  Nov 16 '22 at 6:48 pm
kgw posted Nov 8 '22 at 5:03 pm

I installed the 4.91 upgrade and it looks good. Created a self-signed certificate and that now works.

Everything on the mail server is working properly except it won't accept incoming smtp connections from gmail. It looks like an SSL issue, so I created a certificate request (which also works now, thank you) and purchased a certificate. The Mercury documentation does not quite line up with the certificate provided, and I am having trouble following the instructions. I think some sort of conversion or modification of the certificate may be required in some cases. Also, it is not clear if the old self-signed certificate can remain in place or needs to be revoked or deleted or what.

Could we get some clarity on exactly what the purchased certificate needs to look like, what type, where it should be installed, and any other special instruction?

I hate doing anything with certificates, they always seem to be trouble.

recent by kgw  ·  Nov 9 '22 at 5:23 pm
timbr posted Oct 22 '22 at 11:11 pm

Hello everybody,

probably a fringe use case, but I'm trying to set up Mercury for my personal local (on the same machine only) IMAP use. It is not supposed to retrieve or send any mail from or to or in any other way talk to the outside world at all.

The absolutely only task is to provide an IMAP server that can be accessed by an email client on the same machine to move messages to the IMAP folders for archival purposes.
ATM this only includes email from an external Exchange account. I might include other accounts in the future, but that is not a subject for now.

I installed the MercuryI, W and X modules. No idea whether W and X are of any use in my case, but those were the only additional 2 modules I could not rule out immediately.
Since I don't own a domain or any static (or DYNDNS) IP address, I tried to set the domain in the initial configuration to (for lack of a better idea), but now I'm at a loss and don't know how to proceed any further.
I could not find any instructions regarding my use case in the manual or in the FAQ of this forum.

I'm using the Windows 10 stock mail application. I don't want to change that, for the app's seamless Exchange integration. Unfortunately, I also don't know how to configure an email client to use an IMAP server running on the same machine.

Any help would be greatly appreciated.


recent by Joerg  ·  Nov 3 '22 at 9:10 am
kgw posted Sep 20 '22 at 7:31 pm

I keep looking for it and the docs indicate it exists, but it isn't where the docs say it is.

I have also been unable to find the downloads for Mercury add-ons for this feature.

How do users get Mercury to autorespond with a scheduled "out of office"? All users have Microsoft Outlook.

recent by kgw  ·  Oct 7 '22 at 9:25 pm
kgw posted Aug 29 '22 at 12:58 am

Sorry if this topic has already been covered. I can't see any 'search' feature on the forum, so I might have missed it.

I'm wondering if anyone has any information regarding setting up Mercury for cellphones. I have a licensed copy, installed and working with Outlook clients on the LAN, but I don't seem to be able to get reliable (relatively secure) email send/receive with iPhone and Android cellphones.

I have a self-signed certificate installed and I think I have the correct ports open on the firewall. I prefer IMAP but if necessary then POP is an option.

Anyone know what the settings in Mercury should be and what firewall ports need to be open/forwarded?

Thanks in advance for any hints and advice.

recent by kgw  ·  Oct 7 '22 at 9:19 pm
cncjerry posted Aug 24 '22 at 5:47 pm

Hi, long time user and love the mercury email server.

I've seen a lot of ehlo [] logins recently and had entered this into the transflt.mer file on the compliance screen:

H, "[]", DSX, "local"

but it now matches every incoming message. So I tried this:

H, "ehlo []", DSX, "local"

and that matched none. So I downloaded the 4.9 release and that diddn't matter.

I have relaying turned off, etc. I guess I'm going to look for the doc on the new release but wondering in the meantime what could be the problem(s) with the match above.



recent by cncjerry  ·  Aug 24 '22 at 10:27 pm

Hi Guys,

Wondered if someone could guide me please.

I have Mercury set to forward one email address here to a gmail account. Until I enabled SSL in Mercury E, everything was working fine. Now I'm getting this:

The attached message has failed delivery and has been referred
to you as postmaster. The following error report or reports
were given to explain the problem:

*** [redacted]
550-5.7.25 [redacted] The IP address sending this message does not have a PTR

It this something I have to do in Mercury, or is it a DNS setting with the provider through which I have my main domain?


I found one other post mentioning this but no solution. It seems the fix is still in the works. Does anyone know of a workaround?

The issue occurs when creating a self signed certificate. While on the dialog box to create the certificate clicking create fails with "The system cannot find the file specified".

Screenshot attached.


recent by kgw  ·  Aug 20 '22 at 1:58 am
Dneedhelp posted Aug 10 '22 at 5:13 pm

Issue: Mail won’t send
Issue with: Mercury/32 - (used through XAMPP)
OS: Win10

Normal behaviour: Connect to Mercury - send mail - Change sender name - add recipient name - add subject - add body - mail sends and is received into test inbox - all points check out.

Issue context: Mercury/32 won’t let me send mail. Not even test mail. I have seen many tips to do it with Thunderbird bird and localhost but, before I was able to send it without any configuration. I just had to put a mail address, subject and body. Now nothing at all sends out. Whether or not I use apache and or proxy?

What can I do to get it to work and send mail. First as localhost , then as another email other than localhost.

I am using vpn. I was using vpn when it was working the first round and I have test mails which have gone through from that time.

Tries: I tried turning off vpn - I tried turning on Apache - I tried turning on Tomcat - I installed a separate Mercury/32 outside of XAMPP still issue arises. Now I can not even amend local users.

I need help. Like step by step. I have tried all I can at my basic level.

cgodby posted Jun 28 '22 at 7:03 am


Microsoft will be turning off Basic Auth in the coming months on their online Exchange servers:

I tend to use Mercury32 to retrieve emails (using MercuryD) from an online Exchange server and deliver them to local email accounts (client PC can't connect direct to the online Exchange server).

I can't seem to find a way to switch the authentication MercuryD uses away from Basic Auth to Modern Auth, which means come October 2022 Mercery32 will no longer work with online Exchange servers.

I've tried to search forum but can't find any reference to this.
Granted I'm using v4.8, but is anyone aware of this issue and know how to use MercuryD using Modern Auth??


recent by Sellerie  ·  Jul 19 '22 at 9:26 am

As we need to relay e-mails from a private network to gmail, we tried Mercury to replace an old free mail server we were using until now.

Everything was working good, until I closed and re-opened Mercury, authentification with gmail smtp server failed after that.
I identified the problem as Mercury unable to read the hash sign (#) correctly from mercury.ini.
We have such a sign in our gmail password (and can't easily change it as we have several sites already using it), and even if SMTP_Password has the right value when closing Mercury, when re-opening it the value is only read until this #.

Is there a known workaround? I tried escaping it (\#,##) but it is not working.
We'd really like to buy the license so that we can start it as a service, but right now we need to retype the password in the configuration screen each time after starting it.

Thanks in advance.

recent by paumier  ·  May 30 '22 at 5:07 am

I cant find the way to change (enlarge) the fonts used in the To: Subject: & cc: windows when creating new mails or replies. Its easy to change the fonts in the message window, but this doesnt do anything for the other windows and for some reason unknown they have recently gotten much smaller than i recall them bieng before. Using Pmail 4.7 in Windows 7.

Is there a specific file where all these data are stored?


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