Zoom invites getting stuck in outbox

I’ve had two instances this week where zoom invites got stuck in my outbox. This has never happened before, and it’s only happened with zoom invites; other emails that I sent went out fine.

I’ve found that the invites will go out if I close emclient and then reopen it.

Any idea what’s going on?

That is strange only Zoom invites get stuck in your outbox. Shouldn’t normally be any difference to regular emails going out.

Sometimes emails can get stuck in the outbox if you have eg: optional Antivirus email scanning running. If you do try completely disabling that to test.