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  ARM Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life (Terry Pratchett, Jingo)

Classic Outlook explodes when opening more than 60 emails

(2024/11/05)


Microsoft has confirmed that opening too many emails at once in Classic Outlook could result in the application displaying an error before crashing. But don't worry; there's a registry change to fix it.

The problem afflicting Outlook 365, [1]according to Microsoft , can occur when users open more than 60 emails at the same time. Outlook might then complain about a lack of memory or system resources and subsequently crash.

It's a scenario all too familiar to longtime Windows users. Badly behaved applications consuming resources until something fails is commonplace, and seeing an "Out of memory or system resources. Close some windows or programs and try again" message might trigger a sense of deja vu and irritation at whatever coding decision led to the problem.

[2]

Microsoft's advice? "Avoid opening more than sixty emails at the same time."

[3]Black screens still plague Windows 10 Azure Virtual Desktop users

[4]Amazon adds MFA to its enterprise email service ... eight years after launch

[5]Microsoft admits Outlook crashes, says impact 'mitigated'

[6]Copilot's crudeness has left Microsoft chasing Google, again

Alternatively, the company suggests a registry change to increase the process quota, which will doubtless delight admins who have to deal with users who simply must have more than 60 emails open at a time.

Microsoft is looking into the problem. In the era of multi-gigabyte systems, it seems highly unlikely that a lack of RAM is the problem when only 60 open emails are enough to trip up Classic Outlook. More likely, it's something to do with [7]user interface objects and object handles.

[8]

Upping the USERProcessHandleQuota value to get around the issue might have unwanted consequences, Microsoft warned: "Increasing the process quota could lead to overall system instability because it enables all processes on the machine to have more user objects open at the same time, placing additional strain on the operating system."

And nobody wants to put additional strain on Windows. The poor thing has enough trouble keeping the ads and widgets flowing. ®

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[1] https://support.microsoft.com/en-gb/office/classic-outlook-errors-opening-more-than-sixty-emails-at-the-same-time-7f3726e1-f0d7-4a3a-9076-850c5fabfa20

[2] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_software/applications&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2ZypPOTK4FuHbq-6fef4JTQAAAMY&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0

[3] https://www.theregister.com/2024/11/04/black_screens_windows/

[4] https://www.theregister.com/2024/10/31/amazon_mfa_workmail/

[5] https://www.theregister.com/2024/10/10/microsoft_outlook_outage/

[6] https://www.theregister.com/2024/10/09/copilot_vs_notebooklm/

[7] https://learn.microsoft.com/en-us/windows/win32/sysinfo/user-objects

[8] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_software/applications&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44ZypPOTK4FuHbq-6fef4JTQAAAMY&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0

[9] https://whitepapers.theregister.com/



Auto Delete

The Man Who Fell To Earth

Yea, Microsoft should just automatically delete all emails that someone attempts to open once the 60-limit is reached. That will teach 'em!

Re: Auto Delete

Yet Another Anonymous coward

Remember when your outlook.pst file going over 2Gb would silently corrupt it ?

The good old days.

Gates

Roj Blake

Bill Gates probably told them that 60 emails ought to be enough for anyone.

Rich 2

While MS software is undoubtedly to blame here - because ALL MS software is utter shite and worthy of blame - a part of me is of the opinion that if you open 60 emails at once then you sort-of deserve something bad to happen

jdiebdhidbsusbvwbsidnsoskebid

Why should it crash anyway? If it starts to run into resource issues and it knows it, just stop the opening of more emails with a "that's enough emails, deal with what you've already got before doing any more".

I think the only time I've opened now than a few emails at a time is when outlook has already ground to a halt and somehow my frustrated keyboard mashings get cached and later interpreted as "select all -> enter".

LVPC

It's a reflection on people's cognitive decline - they can no longer remember what they read a moment ago, so they need to leave it open.

That's one of the consequences of outsourcing your memory to a machine.

LionelB

More charitably, if you feel the need to open 60+ emails, chances are you have much bigger problems than software-related ones, and should, if you can temporarily control the weeping, urgently consult your therapist/union rep/dealer (delete as appropriate 1 ) rather than tech support.

1 Assuming these are not the same person.

gryphon

Had a guy at previous company would always have loads of mails open, would get MAPI resource error messages but was senior enough to give us the brush off to our polite recommendations to perhaps not open so many mails at a time.

This was back in Exchange 2003 and 2010 days. Microsoft.Mapi.MapiExceptionSessionLimit., event 9646

Ended up having to give him View Information Store Status rights on Exchange to get around it.

Doctor Syntax

It's just nature's way of telling you that reading 60 emails all at once is silly.

m4r35n357

. . . and using Outlook is even sillier (we had to use it in the 1990s, but humanity has evolved since then, hasn't it?).

m4r35n357

****ing top-posters!

Irongut

No we didn't use Outlook in the 90s we used Eudora, Pegasus, Lotus Notes (eww!), MS Mail or one of the many other email clients that existed at the time.

We definitely didn't HAVE to use a client that was first released in January 1997 so wasn't available for MOST of the 1990s.

m4r35n357

Hey, I was just going from memory! Eudora was great - they nailed email on the first attempt. It has all been downhill from there.

Is it..........What.

JWLong

First the article says "Classic Outlook" as in Outlook.exe? Then goes on to talk about Outlook 365 chrashing.

Two different things aren't they.

I do believe Micro$oft has been sabotaging Outlook.exe every month to get people to go to Outlook365.

Screw Micro$ofr, I started using ThunderBird. I disapprove of everything 365.

Re: Is it..........What.

chivo243

And in the beginning it's opening 60 at once, and near the end it says having 60 open. Just started with an org that uses O365, Outlook misses the mark, still missing key elements. Stop now, it's early now, and I want to think happy thoughts.

Re: Is it..........What.

tony72

First the article says "Classic Outlook" as in Outlook.exe? Then goes on to talk about Outlook 365 chrashing.

Two different things aren't they.

They could have been more precise, but Microsoft 365 installs an "Outlook.exe", which, assuming one has not clicked the "Try the new Outlook" toggle at least, is just an up-to-date build of classic Outlook. Yes, you can use Outlook 365 on the web, and yes, you can opt in to the "new Outlook", but assuming they are talking about the installable, non-new "Microsoft Outlook for Microsoft 365", I think it's fair to refer to that as either "Classic Outlook" or Outlook 365.

Re: Is it..........What.

Anonymous Coward

"Classic Outlook" and Outlook as part of Office/Microsoft 365 are the same thing, just with a different license structure.

The article refers to Classic Outlook to differentiate it from "New Outlook", which is the latest incarnation of Outlook Express - the hobbled, even less predictable, half cousin of actual Outlook.

I'm pretty sure that Microsoft have done some market research and found the Outlook is the only product that businesses deem critical to get from MS and as such everything is gradually being renamed to Outlook - hence Outlook (the latest incarnation of Hotmail), Outlook (the email/calendar/contacts app), Outlook (the mobile version that's so different to the desktop that it should have a distinct name) and Outlook (the 'new' pile of dung)

MadocOwain

Step 1: Select 60+ email messages, preferably from your Junk folder

Step 2: Accidentally hit "ENTER"

Step 3: Profit..?

works OK on thunderbird

andy the pessimist

I can't think of a reason to open 60 emails at once.

Using thunderbird under thunderbird (fedora fc40) I opened 40 emails. Everything worked normally. Microsoft please qa and improve all of your software.

Re: works OK on thunderbird

Chasxith

They have QA, it's just in this case it's the end user.....

Re: Using thunderbird under thunderbird (fedora fc40) I opened 40 emails.

MiguelC

Well, if you did the same using Outlook it would also probably be OK, as the problem only manifests itself after 60 emails....

You should test how many emails you're able to open with thunderbird and report back.

How many open emails?!?!

Hans Neeson-Bumpsadese

Madness. If I went around opening that many emails at once, my 'unread messages' count might risk dropping below a four-figure number

Re: How many open emails?!?!

Anonymous Coward

Egad Man, create rules and automatically mark that guff as read....

I have a desktop chugging away on my desk 24/7 with Outlook running just to process the rules for incoming the hundreds of alerts, ticketing system updates and other extraneous nonsense that I need to receive but rarely need to read...

Re: How many open emails?!?!

Anonymous Coward

You leave a machine on to do that? I just put it in a sieve script and let the server handle it all.

Re: How many open emails?!?!

Sudosu

I wonder how many monitors they have...and I bet all the desktops are covered in files and not links too.

Users...

GlenP

I have users who will open an incoming mail and if it needs action they'll leave it open until they get round to dealing with it - they then close it and leave it in the inbox.

Result, multiple open emails (although 60 would be excessive I've seen around 20 at once) and an Inbox running to thousands of messages.

I've tried educating them, if it's in the inbox it needs dealing with, otherwise it's deleted or filed, to no avail.

Wot no ...

Eclectic Man

"Abort, Retry Fail"

option?

I'll get my coat, its the one with the floppy discs in the pocket.

How to handle 'Out of memory' errors

trevorde

Worked on some high end Windows software which detected out of memory errors and popped up a dialog box telling the user to close down apps to free up memory. I looked at the code behind this and all it did was try again and then ... crash. Turns out our software leaked memory and memory fragmentation was the real problem. No fix for that but to restart the software, which the crash forced the user to do.

Invasion of the Dancing Penguin

Those annoying, dancing cartoon characters embedded in software applications
are no longer confined to Microsoft programs. They have entered the realm
of Linux. A new Linux distribution under development, called LinTux,
promises to provide a more "user-friendly" environment through its "Dancing
Penguin" assistant.

Dancing Tux will "guide" users through the installation process and will be
a permanent fixture of the X root window. The LinTux staff demonstrated a
prototype version of the Dancing Tux program to this Humorix reporter. It
was certainly impressive, but, like the Dancing Paper Clip in Microsoft
Office, it becomes annoying very fast.

The one redeeming feature of LinTux is that, when the system is idle,
Dancing Tux becomes a make-shift screen saver. The animations included in
the prototype were quite amusing. For instance, in one scene, Tux chases
Bill Gates through an Antarctic backdrop. In another animation, Tux can be
seen drinking beers with his penguin pals and telling Microsoft jokes.