Bumping this Message Recall thread in 2024, because it's an ever-more frequently requested feature, and is definitely NOT an Outlook-only thing. Exchange webmail (OWA) also supports message recall, and the masses are clamoring for it ever more loudly.
The number of customers asking for a Message Recall function is growing, and in fact, we had another case this week. (which is why I'm looking for posts about any new developments on the topic.)
An executive at a very large company (over 1800 users) we host, accidentally sent a very confidential email to the wrong recipient of similar name to the intended recipient. (autofill cache mis-click) He noticed the mistake almost immediately but there was no way to stop the message. He called the IT helpdesk right away, but by the time someone could log in, impersonate the recipient and find the right message, the email had already been read.
He mentioned the mistake to a trusted colleague and they asked him why he didn't just recall the message. That colleague was new to the company and came from a brokerage that used Exchange Server, which supports Message Recall. That started a "why don't we have this" discussion at the executive level.
So once again, we're getting pressure on why a mail system that we advertise as an Exchange alternative, doesn't support important Exchange features like Recall.
So please, let's do a +1 for getting Message Recall on the feature list. If you agree, please up-vote.