Can I use all mailclients within ToDoist?
I discovered that some mailadresses will be set "ON HOLD" when inviting them for sharing a project. Gmail adresses work fine and fast, but Fastmail takes much time or is discarded, Hotmail is often refused by Todoist by a -403- error. (The request is out of time, passed, etc). Is there a restriction? Can I standard use every mailadress to invite, share and assign? Or is it only gmail that works fluent?