Which mailboxes does Monty support?

Gmail and Google Workspace, Microsoft Outlook and Microsoft 365, and any inbox that speaks IMAP and SMTP — which is how inboxes bought from a mailbox provider connect. Google and Microsoft inboxes connect either through the provider's official sign-in for one person, or through one approval by your IT admin for the whole team; neither involves your password. Monty sends from your real address through your own mailbox, never a relay domain, so your reply arrives from the person your lead already knows. Self-hosted or on-premise Exchange is the one setup we do not support yet; contact us if it is a blocker and we'll tell you honestly where it sits on the roadmap.