Community Discussions and Support

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

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?


TerryRodgers posted May 5 '22 at 2:43 pm

I have an old listserver that uses Mercury Mail. When I say old I mean prior to 2011 and running on Windows 2003 Server. I will be upgrading this to a newer version of listserver but in the meantime I need to gain back more disk space. My question is, can I safely delete .CNM files? There are several hundred thousand. They all appear to be log files of delivery failures.

rwagner posted Apr 25 '22 at 11:21 pm

I use Spamhalter for round ten years. And after the update to Mercury 4.8 it doesn't work no more. As always - I didn't change a thing. Any ideas?
It starts up and tells "Spamhalter is running" - but obviously it doesn't work.

recent by Joerg  ·  May 2 '22 at 8:25 am
TonyQuick posted Mar 2 '22 at 5:56 pm

I'm using Mercury/32, v4.90.298 with SMTP Client (end-to-end version).

In the past three days, I've seen six emails being sent to known valid addresses that fail with:
Permanent error 250 (no data or no address - name server conf) resolving ''

Checking the MX records for the domains finds all of the failures are pointing to something like

In each case, after the failure, checking the DNS records shows no DNS problems, and resending the message succeeds.

I searched logs back a few months. It happened twice in December. None in January. Four times in February. Three times yesterday, and once so far today. (Edit: twice today now.)

They are apparently transient errors, but the error message indicates permanent failure.

Anybody else seeing anything like this?

Any thoughts?


recent by TonyQuick  ·  Mar 9 '22 at 11:44 pm
GolanTrevize8 posted Feb 14 '22 at 6:09 pm

Will DKIM be implemented in future versions of Mercury?

I have SPF and DMARC setup for my domain but after having to help a client recently with DKIM setup in GoDaddy for their Office 365 mail it got me wondering about DKIM support in Mercury.

GolanTrevize8 posted Jan 28 '22 at 9:00 pm


I used to run a licensed Mercury server for our company years ago but was forced to switch to MS Exchange by a new manager. I am now trying to setup my own Mercury server for personal use because I'm sick of my provider putting almost EVERYTHING in my junk folder. Unfortunately I have forgotten much of what I knew regarding the setup of Mercury.
I am at the point where I am able to receive mail for my domain but I can not get aliases working. My local user name is "dstevenson" and this is what I entered in c:\mercury\mercury\alias.mer:

(domain name changed for privacy) == dstevenson

I exited and restarted Mercury and sent test emails from a different address but they get rejected with user not known.

What could I have done wrong with my setup? Not sure where to look. What information should I post to get help?

recent by Duke  ·  Feb 14 '22 at 5:22 pm
Filippo72 posted Jan 22 '22 at 11:17 am

Hello again.
I just upgraded to 4.9, and I noticed something strange.
Let's say I have a mailbox on internet, called
M32 polls the mailbox via pop3, and deliver the mail to the local user called dummy.
User dummy has a forwarding file like this

Forward-To : userME06
Forward-To : userME07
Forward-To : userME08
Forward-To : userME09
Forward-To : userME10
Deliver-Also : N

which forwards the mail to the local users userME06 etc.

Before the upgrade, this was the output in the core windows, when mail was processed

Sat 22, 11:56:23: Job MG000001: from (non-local)
To: dummy (local) -OK
Sat 22, 11:56:39: Job MG000002: from (local)
To: userME06 (local) -OK
To: userME07 (local) -OK
To: userME08 (local) -OK
To: userME09 (local) -OK
To: userME10 (local) -OK

So, the first two lines mean that Core delivers the incoming mail to dummy, and the remaining lines mean that the mail was forwarded from dummy to the other users.

After the upgrade to v.4.9, this is the output

Sat 22, 11:56:23: Job MG000001: from (non-local)
To: dummy (local) -OK
Sat 22, 11:56:39: Job MG000002: from (local)
To: userME06 (local) -OK
To: userME07 (local) -OK
To: userME08 (local) -OK
To: userME09 (local) -OK
To: userME10 (local) -OK

Why "ErrorHandelr-etc..." instead of "dummy"?
The system seems to works flawlessly, but I'd like to know the meaning of "ErrorHandler"...

best regards

recent by Joerg  ·  Feb 11 '22 at 1:07 pm
Filippo72 posted Jan 21 '22 at 10:44 am

the manual reports that the simplified phishing protection is account based, meaning that in case of wrong password the account becames locked for 30 minutes.
Just to be sure: does this mean that, after a lock, the legitimate user, using it's own legitimate and correct password, cannot access his account for 30 minutes?
Best regards

4c3T posted Dec 31 '21 at 9:50 am

Maybe I didn't fully check the forum, but I did a search and got 0 results.

I came here to see if there were any tutorials for how to set up a mail server.
Last time I had one, I also had a proper domain with A- and MX-records and all that, but that was probably 15 years ago when me and a friend ran a small web hotel that never were that popular.

We did manage to get that working (mDaemon for Windows) and it was very straight forward with explainations and FAQs.
This was a long time ago, and I haven't used any mail servers since, so I'm afraid I've forgotten the most part.

Anywho, this Mercury seems very capable, and it's a bit out of my league, and I've been playing with it a bit, but I can't connect to it with my mail client, and I was hoping, as per the title, to find a simple tutorial on how to set up a functional mail server with the basics working.
I was a bit disappointed not to find that here, but as I wrote, I didn't do an extensive search for anything.

Would be nice with pictures and explanations for dialogs and such.

recent by Sellerie  ·  Jan 15 '22 at 10:13 pm
Sellerie posted Jan 9 '22 at 2:20 pm

My in July 2017 communicated problem still exists.

---------' Lade TV-Planer E-Mail '---------

TV-Planer: Keine TV-Planer Nachricht in den letzten 0 Tagen
TV-Planer: (SENTSINCE 09-Jan-2022 SUBJECT "Wunschliste"smile

I have to rewrite the python file again to:

searchstr = '(SENTON {day:02d}-{month}-{year:04d} SUBJECT "' + subject + '")'

After changing the log contains:

--------' Lade TV-Planer E-Mail '---------

Extrahiere HTML Part der TV-Planer E-Mail.
Erstelle Backup der TV-Planer E-Mail.

Joerg posted Oct 26 '21 at 9:28 am

Hi guys,

Has anybody already upgraded to v4.90? I'm interested in any experiences before updating our Mercury v4.81 email production system.

I'm taking for granted that the direct setup "over" the existing version works as usual and the setup process is recognizing a running version to take over all settngs, isn't it?

recent by Joerg  ·  Dec 27 '21 at 9:34 am

I'm looking to rearrange the account entries in the MercuryD module. The entries themselves are obviously encrypted and simply rearranging the lines didn't work. I seem to remember something from a long time ago saying that there was a way to write the unencrypted entries to the MercuryD.dat file but I forget how. Is there a way to decrypt the entries or some other way to rearrange the order of the accounts other than re-entering them by hand?


Using PMail 4.41 (yes, I know it's old)

Maybe for the last month or so, when viewing mail in the New Mail folder, I have been receiving emails where the From field and/or the Subject field are blank.

When I examine a regular email using the Raw View, I see that those fields are plain text (appropriate email addresses or subject text). When I examine an email where the From field or Subject field are blank, I see something like this:

From: =?UTF-8?B?4oCq4oCq4oCq4oCq4oCqTmV1cm9wYXRoeVRyZWF0bWVudEdyb3Vw4oCq4oCq4oCq4oCq4oCq?= <deleted for privacy>

Subject: =?UTF-8?B?4oCq4oCqU+KAquKAqnXigKpmZuKAqmVy4oCq4oCqIEbigKpy4oCqb23igKrigKogTuKAquKAquKAquKAqmVyduKAquKAquKAquKAquKAquKAquKAqmUg4oCq4oCq4oCq4oCq4oCq4oCqUGFpbj/igKo=?=

To: <my email address>

Can anyone tell me why this is happening? What email system (host or transport) is creating these messed up fields?

Fortunately, most of these are spam, but still ..

Thanks in advance!



We use the Pegasus public folders for archiving and filing.
Since e.g. appointments sent from Outlook are not displayed in Pegasus, some colleagues use Outlook and Pegasus in parallel as mail programs. Unfortunately, simultaneous access to an account (with Pegasus directly and with Outlook via the Mercury IMAP interface) is not possible.

Mercury will prevent IMAP access to the account while Pegasus is open. Is it possible to change this way of working, especially since there should be no problems with Pegasus > 4.0 (see note when installing Mercury)?

If you use both the IMAP server and locally installed copies of Pegasus v3.x to access maiboxes, you must ensure that you never access the same mailbox using both at the some time.

So, you must not start a copy of Pegasus Mail accessing a mailbox that is currently being accessed by the IMAP server. Equally, you must not login via IMAP to a mailbox that is currently being accessed by a copy of Pegasus Mail.

Failure to observe this requirement may result in damaged folders and loss of data!!

Note that it is OK for multiple IMAP connections to exist to the same mailbox. The prohibition only applies to simultaneous access by MercuryI and Pegasus Mail. This problem was addressed in Pegasus v4.0, and only applies if you are using an earlier version of Pegasus Mail to access your IMAP mailboxes.

recent by Duke  ·  Nov 8 '21 at 11:56 am
Brian Fluet posted Jun 18 '20 at 7:20 pm

I'm exhausted from testing different iOS mail apps for IMAP access to

a test mailbox (my Spam mailbox).  None will refresh and display the actual content of

the mail folder.  The Outlook app says there are no new messages even though there are +50.  Spark

only displays the list of messages it access during it original connection several days ago even

though those have all been deleted.  Edison won't connect (doesn't send a

STARTTLS command), there was a forth that is completely forgettable

other than it appeared to connect but no messages were displayed, similar

to the Outlook app behavior.

I can see connections in the MercuryI window but no data is displayed by the apps.  It just shouldn't be this hard.

I don't know what kind of help to ask for other

than to request a response from anyone who has an iOS email app working.

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