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SmarterMail Build 9610 (April 24, 2026)
Question asked by J. LaDow - 4/25/2026 at 8:15 AM
Unanswered
J
New comments/problems thread for SmarterMail Build 9610 (2026-Apr-24)

CHANGELOG
  • Added: [API] Calendars -> CalendarStartImport.
  • Added: [API] Contacts -> ContactsStartImport.
  • Added: [API] Notes -> NotesStartImport.
  • Added: [API] System Admin -> GetDeletingDomains.
  • Added: [API] System Admin -> GetDomainAliases.
  • Added: [API] System Admin -> GetDomainAliases.
  • Added: [API] System Admin -> ListInternationalizedDomainNames.
  • Added: [API] System Admin -> ListInternationalizedDomainNames.
  • Added: Authenticated SMTP sessions to the user's Connectivity page matching other protocols.
  • Added: Better handling when popups are blocked when impersonating.
  • Added: The ability to choose between RSA and ECDSA for ACME certificates.
  • Added: The ability to select a 90 minute meeting time option in Scheduled Meetings.

  • Changed: "Remember Me" tokens are now invalidated when enabling 2FA or a user resets their password.
  • Changed: 2FA now uses JWT tokens.
  • Changed: DKIM Header Fields to sign now filter out fields for "X-MS-*".
  • Changed: Improve ACME certificate generation logic.
  • Changed: Improved the flow for forcing a password reset.
  • Changed: Now account for Let's Encrypt certificates having a shorter expiration date.
  • Changed: Removed the success toast notification from all grid "refresh" buttons.
  • Changed: Updated EULA text.
  • Changed: Updated installers to use .NET 10.0.7.
  • Changed: Updated Maxmind database.
  • Changed: Updated to ClamAV 1.5.2 for Windows.

  • Fixed: "What's New" modal shows a scrollbar when it's not needed.
  • Fixed: [HA] [HUB] Fresh Hub installs do not create the hub-settings.json file as needed.
  • Fixed: [HA] [HUB] Log lines can show up out of order.
  • Fixed: [HA] [HUB] Logs return inconsistent results for searches.
  • Fixed: [HA] [HUB] When viewing combined hub logs, the truncated view shows the earliest lines instead of the most recent.
  • Fixed: [HA] AUTH PLAIN not working for IMAP sessions.
  • Fixed: [HA] Deleting and recreating large domains results in combination of error toasts.
  • Fixed: [HA] Deleting large domains (100,000+ users) times out resulting in garbled red toast error.
  • Fixed: [HA] Hub Protocol Proxy session logging lists multiple session ID's per log line during on-going concurrent sessions.
  • Fixed: [HA] Importing large number of users via CSV results in red toast error.
  • Fixed: [HA] Incorrect caching on a Backup MX causes deliverability issues.
  • Fixed: [HA] It's possible to impersonate a broken domain and user from the hub.
  • Fixed: [HA] MD5 auth methods not respecting app passwords for IMAP, SMTP, XMPP in HA environments.
  • Fixed: [HA] Plain text authentication methods for all protocols failing for app passwords.
  • Fixed: [HA] Routing Rule "Enable wildcards" option toggles off upon initial save and for subsequent saves as well.
  • Fixed: [HA] SmarterMail initiating SSL certificate requests for non-FQDN hostnames.
  • Fixed: [HA] SMTP Proxy logs aren't providing sufficient data, even when set to trace.
  • Fixed: [HA] Unable to enable 'Force all traffic over HTTPS'.
  • Fixed: A connected internet calendar can be set as a default calendar.
  • Fixed: An issue adding/editing External Senders when using "Add Text to Subject" and "Known External Domains" option.
  • Fixed: Attaching a base domain path and going back will not allow you to go forward again.
  • Fixed: AUTH call still appears if no associated authentication methods are enabled.
  • Fixed: Calendars and Task upload is clickable before any file is selected.
  • Fixed: Cannot disable ChatGPT in Marketplace.
  • Fixed: Cannot save an outbound gateway in a disabled state.
  • Fixed: Changing a username over  the Windows character limit presents an untranslated toast notification.         
  • Fixed: Chromium-based browsers show the wrong pointer on filter rules.
  • Fixed: Contact import hangs when importing a malformed CSV.
  • Fixed: Content Filters do not show the correct number of conditions or actions when deleted.
  • Fixed: Content Filters/Routing Rules fail to save 'include system messages..." toggle on initial save operation.
  • Fixed: Conversion issues when migrating to Linux.
  • Fixed: Conversion page will set secondary storage url to the domain archive url if archive folder already exists.
  • Fixed: Creating a Routing Rule for Inbound, then saving, reverts the Rule to Inbound + Outbound.
  • Fixed: Delegate settings aren't properly syncing between MAPI and EWS clients.
  • Fixed: Deleting an instance of a recurring all-day calendar event is failing for users in UTC+01:00 time zones.
  • Fixed: Document servers (OnlyOffice or Collabora) still show as available even if the server address is incorrect.
  • Fixed: Domain Defaults are not respecting the gateway setting.
  • Fixed: Exceptions can occur when trying to bind TCP listeners to ports on IPv6.
  • Fixed: Expire Password shows when an AD/LDAP authenticated user is selected in the Users tab.
  • Fixed: Extraneous SignalR errors in the browser console.
  • Fixed: IMAP connections stick around even after IMAP is disabled server side.
  • Fixed: Importing a large number of Contacts causes webmail to stall.
  • Fixed: Initial chat message from webmail to eM Client (XMPP) is not being received.
  • Fixed: Issue with GetUser API endpoint not returning "lastLoginTime".
  • Fixed: Issues with previewing and downloading attachments in messages that use winmail.dat.
  • Fixed: Light Mode/Dark Mode menu option has extraneous spacing.
  • Fixed: MAPI delegation permissions do not sync correctly.
  • Fixed: Message Archive attachments show "Access Denied".
  • Fixed: Moving/renaming a folder can break related Auto Clean rules and Content Filters.
  • Fixed: Not all Delivered and Forwarded messages are triggering for Routing Rules.
  • Fixed: Notes failing to load or can show a spinner.
  • Fixed: Online Meetings duplicate links in chat.
  • Fixed: Rare issue where a server locks up at night when running cleanup tasks.
  • Fixed: Routing Rules condition doesn't display correctly in some scenarios.
  • Fixed: S/MIME encrypted e-mail is not being passed to Outlook correctly.
  • Fixed: Schedule meeting link no longer works after a user rename.
  • Fixed: Schedule send date discrepancy can occur between typed and icon selected dates.
  • Fixed: Searching SMTP Logs for an IP with "Display related traffic" selected returns no results.
  • Fixed: Sent messages are not being delivered if messages are moved out of Sent Items before send notification completes.
  • Fixed: The image zoom selector does not work well with Chrome and Firefox.
  • Fixed: The WebDAV incorrectly processing some requests on any path, except when using the API.
  • Fixed: There's no validation when entering an email address on a Scheduling page.
  • Fixed: Tool Tip for conditions (in Content Filters, Events, etc.) is displaying javascript.
  • Fixed: User Status page is missing columns when exported.
  • Fixed: Validation is choppy when typing a recovery address during the Getting Started process.

  • Security: Possible link traversal issue when using Plus Addressing.
  • Security: Upgraded and strengthened encryption across multiple areas, reducing potential for brute force attempts.

  • Translations: Added Russian language support.
MailEnable survivor / convert --
S
SmP Replied
4/26/2026 at 6:34 AM
Updated within minutes of the release (anytime we see "Security: " in the release notes we tend to pull the trigger faster these days). 

No indication about whether the .net version was updated to address the CVE.
J
J. LaDow Replied
4/26/2026 at 7:45 AM
The installer will update the .NET Core dependency to 10.0.7 as part of the upgrade/install --

  • Changed: Updated installers to use .NET 10.0.7.
If you're on Windows, it will show up in the Add/Remove Programs list -- not sure how to inventory what version is present on Linux -- but the Linux installer does a good job at maintaining the dependency from what I understand --
MailEnable survivor / convert --
Any issues??
Rod Strumbel Replied
4/27/2026 at 6:47 AM
Is this a stepped upgrade?  

I thought I saw in an earlier post that 9581 was a requirement for "new updates" following it, not seeing that mentioned.
Derek Curtis Replied
4/27/2026 at 7:08 AM
Employee Post
Hey, Rod

You can upgrade to the latest from an earlier Build if you like. We recommended moving to 9581 only after upgrading to 9575 and testing out that release as 9575 was a pretty robust release. 9581 introduced the beginning of our encryption changes, so that's really all that was released in 9581. (Though there were some small fixes in there as well.)

So, the recommendation was upgrade to 9575, test it out, then upgrade to 9581. So, if you're not on 9575 yet, that may still be a solution for you. However, upgrading to 9581 first is NOT a requirement before upgrading to 9610. So you could, say, go from 9560 to 9610 if you want. 

All that said, 9610 does have an important addition, and that is extending the encryption updates to shared items: calendar invites, File Storage links, etc. So after upgrading to 9610, all shared items will be encrypted differently than previous versions, so if you DO have to downgrade, any items shared while on 9610 would need to be recreated on whatever version you're downgrading to as any links created while on 9610 won't work anymore. 

We'll be sending our release email this evening that details all of this. 
Derek Curtis
CCO
SmarterTools Inc.
Rod Strumbel Replied
4/27/2026 at 7:40 AM
Thanks Derek!

Just a note to others that have been tracking the speed issue with install and uninstall on Windows Server 2025.  The slow crawl during Configuring Windows Features is NOT resolved yet.   Update on my home server is going on about 45 minutes now and still not seeing any signs of color in the progress bar.

Monitoring it... it appears to be related to whatever the installer is doing and interaction with the Antimalware service of Microsoft Defender.  I have all the recommended exclusions setup for this, so not sure why they are interacting, unless it is due to operations on the Windows Services/Features themselves (which is likely the case).
G
George To Replied
4/27/2026 at 8:01 AM
I just updated SmarterMail 9610 in my Windows Server 2025 1 hour ago.

It took around 2 - 3 minutes to uninstall.  
Then, reboot, and it took around 5 - 6 minutes to install it.

Comparatively, it was still slower than Windows Server 2019 one.

(In the past, I also experienced similar case - Initially blank-new install SmarterMail in Windows 2025, it took around 20 minutes in Configuring Windows Features, simply wait, wait, and wait)
Rod Strumbel Replied
4/27/2026 at 8:06 AM
George... mine is still going... seeing progress bar now, but man... it is a grinder
Rod Strumbel Replied
4/27/2026 at 8:08 AM
Literally just finished right now
S
SmP Replied
4/27/2026 at 8:11 AM
That ongoing Windows 2025 installer issue keeps us on 2022 for now until they confirm it; on 2022 it's very fast to remove/install compared to 2025.
Derek Curtis Replied
4/27/2026 at 8:43 AM
Employee Post
Regarding the Windows Server 2025 issues, from what I'm hearing we're still waiting for an update from Advanced Installer on that. Linux, earlier Windows Server versions, etc. appear to work just fine. 
Derek Curtis
CCO
SmarterTools Inc.
t
terry fairbrother Replied
4/27/2026 at 9:17 AM
" Linux, earlier Windows Server versions, etc. appear to work just fine. "

Not quite, the Ubuntu install I have takes several minutes to stop services. I think I have tried stopping services before the install but the stopping services still appears. The install is pretty fast after that.

No new issues found so far
Build is pulled from Downloads.

Why?
J
J. LaDow Replied
4/28/2026 at 6:09 AM
Still available here in the US from what I can tell as of 8:09AM CDT (GMT-0500)
MailEnable survivor / convert --
Its on again :)
Derek Curtis Replied
4/28/2026 at 6:45 AM
Employee Post
We didn't pull it down, so not sure what may have happened. 
Derek Curtis
CCO
SmarterTools Inc.
t
terry fairbrother Replied
4/29/2026 at 1:02 AM
I may have found a bug under the Linux version, Seems the services tab shows no services....

Same in chrome of firefox. three dots options are greyed out when clicked on. 
Derek Curtis Replied
4/29/2026 at 7:09 AM
Employee Post
Hey, Terry

I sure don't see the same, on either our internal testing install of Linux, or on my own server that also is running Linux. Do you see anything in the console? (BTW, I use Firefox almost exclusively.) I also tested on Safari and Brave on my laptop, and Edge and Chrome on my Windows VM. All worked just fine. 
Derek Curtis
CCO
SmarterTools Inc.
t
terry fairbrother Replied
4/29/2026 at 10:06 AM
My 'free' one is fine, but the paid for one seems to be having the issue. i'm pulling down a vm to experiment on as i'm not keen on testing out on a live install.
rick Replied
5/1/2026 at 6:47 PM
Win Server 2016, 15 mins to uninstall.
Install bombed out with

Reverted back to previous version, sitting here waiting presumably another 15mins for it to install :-(
MattyT Replied
5/3/2026 at 8:16 PM
Windows 2022 std. Update took 3 minutes start to finish and admin login. Whew!
Sébastien Riccio Replied
5/3/2026 at 8:46 PM
On Windows 2019, upgrade took 3-4 minutes. Good :)

In the meantime I've upgraded our SmarterTrack on a fresh Windows 2025 with only SmarterTrack installed, it took 30 minutes with 90% of installation time stuck here:


Advanced Installer seems to still have issues with Win 2025 windows features management.

Hopefully our mail server is not running Win 2025 yet.
Sébastien Riccio
System & Network Admin
Daniele (TDBnet) Replied
5/4/2026 at 12:23 AM
About build 9610: no issues here for 24 hours.
C
Christian Ressel Replied
5/4/2026 at 5:16 AM
Unfortunately, DavX still doesn't work on Android smartphones! All appointments are stuck at 1 a.m....
3 server working, no issue here
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)
Kyle Kerst Replied
5/4/2026 at 1:33 PM
Employee Post
@rick I did some testing on Server 2016 here to see if I could get your installation failures replicated in house but was not able to. Are you able to check for pending Windows Updates prior to running the installer to confirm there aren't any pending updates in there? The installer will attempt to check/install components in IIS which can fail if there are already pending updates or restarts for the server waiting.
Kyle Kerst
Lead Internal Network/System Administrator
SmarterTools Inc.
Tim Uzzanti Replied
5/4/2026 at 3:10 PM
Employee Post
Daniel,

DavX has been assigned to a developer to evaluate whether this is something we can fix or if it will need to be addressed on their end.
Tim Uzzanti
CEO
SmarterTools Inc.
rick Replied
5/6/2026 at 8:01 PM
@Kyle Kerst - I think this was a case of Threatlocker blocking the .NET install. So it wasn't a Smartermail issue (I don't think). Sorry for the false alarm. I have this server locked down so tight that sometimes I forget to disarm!!
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