Message recall in "Outlook" is not supported

If you have a subscription than i would recommend sending a feature request to the support.
And if not you might try issue/feature-request on github.
The links are all above ️

And just for clarification on this "feature" for anyone else:
In Exchange environments (afaicr) this feature only works on your local Exchange or with trusted relationships between the senders and the recipients servers. So very unlikely for anything which went out of your organization.

I needed this feature once in grommunio, the recall message was sent to an internal user, unfortunately the mobile device of this user already got the message so the recall was impossible and I got a message similar to: "recall was not successful".
For me it seams, the recall feature is implemented but the mobil devices make this feature unusable.

WalterH For me it seams, the recall feature is implemented but the mobil devices make this feature unusable.

Didn't know that. And yeah that might be tricky with push-services. Haven't looked up the rules for it on Exchange but i guess it does allow it as long the mail isn't read?!

WalterH crpb The 'Recall' feature has been part of Exchange for quite a while. Over the years I have used it, occasionally, to recall messages which have accidentally been sent before the mail writing was completed (accidental click on Send or pressing Return when the focus was not in the mail body). This has worked on local delivery, and I think remote delivery if the remote server was an Exchange server, but haven't used this for some years now. However, I am aware if the recipient allows delivery receipts the recall will fail as the recipients server will have processed the email.

I suspect that when @WalterH was able to recall a message from a mobile device this was a feature called something like 'undo send' that is implemented in the mobile mail client. Apple implemented the feature in IOS around IOS14/15. It appears to delay the actual sending of the email from the client to the outgoing mail server (message is held in the outbox of the client). In IOS 17, the feature is sort of programmable, by setting the delay Apple Mail uses before sending the email up to 30 seconds. You can access this by opening settings, locate Mail, then at the very bottom of the options you will find 'Undo Send Delay'. Whether 30s is long enough to realise you need to recall a message is a mouse point but the feature does allow for catching incomplete emails being transmitted.

For those who are interested Apple extended this feature into their messaging app (a while back) and it is now also possible to 'Undo Send' for text messages as well (again only a fairly short delay period is allowed). After sending the message if you press and hold on it in the client it will allow recalling the message for a short while. I suspect that other mobile platforms will also have implemented a similar feature by now.

Best Regards

Mark