Build 9756 (Sep 17, 2026)
Question asked by kevind - 9/18/2026 at 6:34 AM
Unanswered

Share your experience with this new build...

  • Added: [HA] [HUB] Show password requirements when a cluster administrator changes password.
  • Added: A setting to block HTTP requests sent to an unrecognized Host header.
  • Added: ARC sealing for mailing list messages that keep the poster's address in the From header.
  • Added: ARC sealing for messages forwarded through aliases to external members.
  • Added: Blank password guards when creating users.
  • Added: Domains can now be configured to allow users to opt in to email Classification versus it being enabled for all users of the domain.
  • Added: System setting to enable/disale the SOAP API endpoints.
  • Added: The ability to disable volume mounts.
  • Changed: [HA] [HUB] Improved error page styling.
  • Changed: [HA] [HUB] Renamed the Settings page to “General”.
  • Changed: A 2FA code is now required when disabling the feature except for System Administrators.
  • Changed: Forwarded messages now retain the sender's DKIM signature and are also signed by the forwarding domain, improving delivery of SRS-forwarded mail to major providers.
  • Changed: The toggles for reporting spam corrections for SpamFoo and Rspamd are now separate controls.
  • Changed: Updated listed time zones.
  • Fixed: [HA] [HUB] Login page custom help login is appending a GET string.
  • Fixed: [HA] [HUB] New IDS rule shows an incorrect error message in text fields.
  • Fixed: [HA] [HUB] Routing Rules display a GUID in place of a gateway name.
  • Fixed: [HA] Spam settings are not always syncing to nodes.
  • Fixed: 2FA ignores webmail's service access setting.
  • Fixed: A specific GRP file can cause the web interface to hang.
  • Fixed: A user named after a recently deleted mailing list will not receive emails.
  • Fixed: Accounts -> Users / Alias / Mailing List, Column and Field Names do not match.
  • Fixed: Bounce Reason event condition doesn't work as expected.
  • Fixed: Bounced local recipients miscounted as remote recipients in delivery throttling and stats.
  • Fixed: Certain European and Asian timezones do not work correctly in calendar events.
  • Fixed: Chat option shows as available on professional edition.
  • Fixed: Consistency issues between domain and system level event conditions.
  • Fixed: Copy pasting files does not always work in Online Meetings.
  • Fixed: DMARC treats an SPF result of Neutral as a Pass.
  • Fixed: External HTML images in emails do not display correctly with certain formatting.
  • Fixed: External posters to Mailing List with "Poster Address" as FROM fail DKIM/SPF checks on remote delivery.
  • Fixed: Failed Delivery Status Notification (DSN) message is sent when SMTPUTF8 style DSN cannot be delivered.
  • Fixed: Forwarded messages could arrive with broken DKIM and ARC signatures.
  • Fixed: Idle email compose windows can sometimes fail to upload files.
  • Fixed: Meeting invites sent from Outlook [MAPI] using a non-Unicode character encoding can appear incorrectly in attendee calendars.
  • Fixed: Polish characters do not appear correctly when emails are auto-forwarded from SmarterMail to Microsoft 365.
  • Fixed: Renaming a folder in Outlook [IMAP] doesn't always sync to webmail.
  • Fixed: Sending event invites with certain delegate settings can cause a delivery loop.
  • Fixed: SharePoint sync can stop working when ann account is configured with 2FA.
  • Fixed: Some contact fields are lost during WebDAV sync.
  • Fixed: SpamFoo classification still occurs even when it's disabled for a user.
  • Fixed: Subject prefixes and spam-type indicators (e.g.m SPAM LOW:) are sent to SpamFoo when reporting spam/ham feedback.
  • Fixed: Using webmail with Firefox browsers overlaps enable/disable toggles on calendars.
  • Fixed: Webhooks in routing rules, system events, and domain events can accept invalid JSON bodies.
  • Efficiency: Better message handling when secondary storage is unreachable.
  • Security: Improved handling of authentication attempts with empty passwords.
updated... 🤞🤞🤞🙅‍♂️🙅‍♂️🙅‍♂️
Gabriele Maoret - Head of SysAdmins and CISO at SERSIS
Currently manages 7 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 6 on-premise for customers who prefer to have their mail server in-house)
Linda Pagillo Replied
I will be upgrading a Windows 2025 server to this build tonight. Will let you know how it goes :)
Linda Pagillo
Mail's Best Friend
Email: linda.pagillo@mailsbestfriend.com
Web: www.mailsbestfriend.com
Authorized SmarterTools Reseller
Authorized Message Sniffer Reseller
 
ICT Informatik Replied
updated - no problems 
Sébastien Riccio Replied
Hi,

A small question before we upgrade:

  • Changed: A 2FA code is now required when disabling the feature except for System Administrators.
Does this also impact disabling 2FA for a mailbox using the API ? We allow our customers to disable 2FA from their control panel if they lost their 2FA device.
Requiring a 2FA code at this point would render this ability pointless.

Thanks a lot for the feedback.
Kind regards.
Sébastien Riccio
System & Network Admin

Linda Pagillo Replied
Upgraded to 9756 last night. Windows 2025 server. No problems with the upgrade and no reports of issues from any customers :)
Linda Pagillo
Mail's Best Friend
Email: linda.pagillo@mailsbestfriend.com
Web: www.mailsbestfriend.com
Authorized SmarterTools Reseller
Authorized Message Sniffer Reseller
 
Mathieu Peloquin Replied
On Linux. Upgraded. Everything looks fine.
Sabatino Replied
Updated 12 hours ago
No problem

Sabatino Traini
      Chief Information Officer
Genial s.r.l. 
Martinsicuro - Italy

Kyle Kerst Replied
Employee Post
@Sébastien Riccio that is a great question and I can do some testing on this through the week and get you an update. Do you mind providing details on which control panel you're using? I know that we have an in-house Plesk and WHMCS environment already that we can test against, but I believe they push you to SmarterMail to manage those settings. If the 2FA reset in your control panel doesn't currently include account for needing the code I would expect it'll need adjustment to it's flow. However, if their 2FA reset mechanism leverages impersonation it may not. 
Kyle Kerst
Lead Internal Network/System Administrator
SmarterTools Inc.
William Allen Replied
Linux upgraded flawlessly. Such an improvement over my IceWarp server which never updated/upgraded without a hitch.
Kyle Kerst Replied
Employee Post
@Sébastien Riccio I completed some testing against Plesk/WHMCS and from what I am seeing they don't actually handle/facilitate the 2FA reset/change behavior directly, opting instead to pass those users directly into SmarterMail. So, I suspect this might be control panel specific and I'll likely need to get a trial copy of it to test further. Can you DM me your control panel type/version so I can do that?

Edit: I found some settings in Plesk I was not previously aware of and with these turned on I do see the ability to reset the SmarterMail user password directly via the Plesk control panel, so figured this might be the same type of process used when 2FA is enabled. 

After setting up 2FA on a test account though I was NOT able to confirm they handle the 2FA through Plesk itself. Password resets are carried out via secret through impersonation, but fail when 2FA is present: 
Options to reset 2FA are not present even when enabled, so this doesn't appear to be supported by Plesk. If you can send me the details on your control panel I can try that one next. Thanks!
Kyle Kerst
Lead Internal Network/System Administrator
SmarterTools Inc.
Sébastien Riccio Replied
Hello @Kyle Kerst,

Thank you for your tests. That's an interesting finding. We are using an home made control panel but I can't tell you right now what exact path it uses to disable a SM user 2FA.

I'm upgrading SM right now, so I will check if after the upgrade, a global or domain administrator using our control panel is still able to disable a user's 2FA.

I hope so, because it would be a regression.

Kind regards :)
Sébastien Riccio
System & Network Admin

Sébastien Riccio Replied
Hello @Kyle Kerst,

I can confirm that after the upgrade, and enabling 2FA for a mailbox from the webmail, I was STILL able, from our control panel, as domain admin to:
- Change the mailbox password
- Disable 2FA for that mailbox

So my fear it would break this seems not relevant.
It seems that we are using SM API calls, from the panel, that don't need to provide 2FA code to apply these changes.

Kind regards.
Sébastien Riccio
System & Network Admin

Kyle Kerst Replied
Employee Post
That is great to hear, thanks!
Kyle Kerst
Lead Internal Network/System Administrator
SmarterTools Inc.
Michael Wallace Replied
We had an issue when we updated our Linux server this morning to the newest build. When testing emails from webmail and Outlook and mobile devices the spool was not showing data going through. Some emails got through and some didn't.

We first planned to restarted Smartermail services on the system to see if that would help, and it did, so we didn't need to reboot the server. Spool started to show data. Some of the emails we sent as tests started to go through and emails started to come in from our backup server we later noticed.

Something happened on the install. Re-starting the Smartermail services fix the issue.

One other strange thing we saw, one of the accounts we were testing has a forward setup. The email went directly to the forwarding email and did not show up in the email account or the spool.

That was our experience with this new build. All other updates were perfect. 
Tim Uzzanti Replied
Employee Post
Michael,

That is strange. Much of what you’re talking about wasn't touched in this release. Sounds like your install was wonky or maybe you didn't have a drive online or something.  
Tim Uzzanti
CEO
SmarterTools Inc.
Michael Wallace Replied
@Tim - I thought it could've been the drives, but upon checking those everything looked good. It came down to a 'wonky install' and the good thing is, everything is working presently. Thank you for your thoughts too.
Linda Pagillo Replied
Tomorrow night I'm upgrading a Windows 2022 server to 9756. Will let you guys know how it goes, but I'm not expecting any issues.
Linda Pagillo
Mail's Best Friend
Email: linda.pagillo@mailsbestfriend.com
Web: www.mailsbestfriend.com
Authorized SmarterTools Reseller
Authorized Message Sniffer Reseller
 

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