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Forum Index : Microcontroller and PC projects : MS 365 website gobbles amazing amounts of RAM....

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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 10048
Posted: 06:45am 23 Sep 2026
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This is quite interesting. (...and a bit of a rant - sorry)

I now run LMDE7 as my main daily PC, and it has 16GB of RAM.
Today, when I noticed that the RAM usage was up in the 90% area of things, I started closing webpages one by one, to see which one released the most RAM use.

When I closed MS365, which I use ONLY for my business Outlook email address......wow.
I signed out of this page - which I keep open 24/7 - and when I did that, TEN GIGS of RAM was released back into the system.

I had ONE email open in MS365 online.
One.

Now that I have moved to Linux, I am looking very actively, for services OTHER then the MS ones, to handle.....well........ANYTHING.

I'm only using MS365 and Outlook email, as that is what my website builder supplies by default(go figure), so now looking for something OTHER then a MS-based email address.

Anyone got any pointers?

I DON'T want to host my own email server, I just want to be able to REUSE my existing email addresses for the company......but NOT have Outlook controlling them.

For obvious reasons of security, I won't post the email addresses I am using with Outlook here in the public forums, but I can certainly let anyone know what they are in a PM.

10-gigs of RAM for a web-based email service with one open email.......  

Outlook is the very LAST of the MS products and services I am still using, so time to dump that too I think.

EDIT: To be fair to MS365, as I keep the business email addresses open 24/7, I expect there is some serious caching that has been going on, but the fact that MS365 Outlook continues to hold-on to and gobble that much RAM, and NOT release it back to the system, is enough of a concern for me, to want to dump it.
Edited 2026-09-23 16:49 by Grogster
Smoke makes things work. When the smoke gets out, it stops!
 
Volhout

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Joined: 05/03/2018
Location: Netherlands
Posts: 6133
Posted: 06:54am 23 Sep 2026
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Hi Grogster,

Depends how deep outlook is embedded in your life. I simply use the web browser (i.e. firefox) to open the web page at outlook.com/gmail.com when running from linux.

For me that is sufficient. And if they cache anything, the caching is in the cloud. Their memory, not mine. Firefox will not exceed it's own cache size.

On the phone (android) I use (G)MAIL client and add all my accounts (Google, but also MS accounts). I have zero MS apps installed. Using these (tried before) is not helping me in any way. Any alternative I try is better for the task I need it for (simple-straight-forward).

Volhout

P.S. I think there are only 2 real good MS apps. Visio and Excel. And for both there are alternatives, also in linux, but (for me) these 2 are the best in their class.

P.P.S. off-topic: I really hate active edges. It lowers efficiency, and shrinks your screen size. And on some tablet android you can't turn them off. The tablet effectively is a paperweight now. No one uses it anymore.. they hate it.
Edited 2026-09-23 17:04 by Volhout
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Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5198
Posted: 08:43am 23 Sep 2026
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I havn't used Outlook since the 1990's when I moved to Eudora email client. These days I use Thunderbird, but miss the old Eudora email client.

Its a shame Libre Office dont have a outlook clone. I've use Open Office / Libre Office as a MS Office replacement for the last 20 years. But I still need a Office 365 licence for customer enquiries where they are using my software with MS office. I find Libre Office is better at handing old and damaged files than MS, plus its faster.

Glenn
The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ
 
Andy-g0poy
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Joined: 07/03/2023
Location: United Kingdom
Posts: 86
Posted: 04:26pm 23 Sep 2026
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Providing you own the domain that your email addresses use i.e.

fred at flintstone.com then you can host your mail anywhere you please.

Two methods the first is to move the domain to a host that provided mail as well - most do. once moved the mail will appear in the inbox associated with you account.

Another method is to have the domain hosted at a domain provider and the forward all mail to whatever mail provider you chose.

I use a catch all setting to do this, but be aware that some providers do not support this method, only specific email, addresses usually with a limit of 50 or 100 forwarders. Not a problem for most people but I have well over 200 email addresses.

I create a new address for every company I do business with. This makes filtering dead easy on receipt.

There are some arguments that catch all is a bit of a security risk in that you can get mailbombs a bit more easily, but so far I've not found that an issue. (after 30 years or so)

If you only have to one ms address then the browser method mentioned would probably be the better option.

Andy
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 10048
Posted: 10:57pm 23 Sep 2026
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The company that setup my website, also setup the email addresses, so I will talk to them first - perhaps.

Then again, perhaps I will just calm down a little and carry on.
I was a little irritated when I posted the thread.  

There IS a fee to use the Outlook email service that MS charge, but it is not very much - about $12 per month or something, per email address.

Setting up with another email server would probably cost equally as much, perhaps even more.

The point being that the email addresses for my company, are owned by the company and the company that setup my website for me, so porting them to another email server should not be THAT painful, I would have thought.

But the problem these daze is ALSO that many companies are offering ONLY Microsoft services on and on-sold basis as part of THEIR business model - hence my having MS Outlook365 for my business mail, when I never really wanted it in the first place, but once my website admin company decided to move ALL their clients website emails to Outlook365, at the time, it was Outlook365 or no email at all.  The website builder company did not/would not offer ANYTHING other then Outlook365 to handle your website email needs, in other words.

I am quite sure that MS love that arrangement and most likely was in their contract.....
Smoke makes things work. When the smoke gets out, it stops!
 
TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6611
Posted: 11:45pm 23 Sep 2026
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Have a look at https://www.fastmail.com/
It should be easy to shift your domain email to.

I am happy dealing with an Australian company.

Jim
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Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5198
Posted: 04:45am 24 Sep 2026
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  Grogster said  

But the problem these daze is ALSO that many companies are offering ONLY Microsoft services on and on-sold basis as part of THEIR business model - hence my having MS Outlook365 for my business mail, when I never really wanted it in the first place, but once my website admin company decided to move ALL their clients website emails to Outlook365, at the time, it was Outlook365 or no email at all.  The website builder company did not/would not offer ANYTHING other then Outlook365 to handle your website email needs, in other words.

I am quite sure that MS love that arrangement and most likely was in their contract.....


Yep. Pretty much most IT businesses push the Office 365 route. They get a kick back, and it makes it easier for them to manage the service, set up emails, etc. Buts its a rubbish service, designed for day to day users that dont ask questions or want something out of the ordinary. I have to deal with these businesses all the time.

I'm lucky, I have a friend who takes care of my own servers and email, does everything with Linux servers, and its a vastly better service. I pay him several hundred a month, but my uptime is pretty good and people like him are hard to find.
The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 10048
Posted: 06:02am 24 Sep 2026
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  TassyJim said  Have a look at https://www.fastmail.com/
It should be easy to shift your domain email to.

I am happy dealing with an Australian company.

Jim


Yes, this website looks good!  

I'm going to look into this more.

Their basic email plan, is HALF the price of what I am paying for the Outlook one now, and they aparently make it easy to move from Outlook - they have tools that do it all for you, from what I can see.

Another thing that is starting to irritate me with Outlook365, is that MS are FORCING their stupid f-ing AI into even you EMAIL service now.  I already pay for the Outlook service, I don't want stupid AI pop-ups and other crap that is now landing in my inbox under Outlook, like MS seem to think that the entire world will end, if they don't THRUST their AI bollocks on EVERYONE - weather they want it or not.  
Smoke makes things work. When the smoke gets out, it stops!
 
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