Troubleshoot email delivery

Saving a Message and sending an email are different operations. Formist persists the Message first, then sends through the signed-in user's Microsoft 365 mailbox.

Read the delivery state

• A draft exists only in Formist until you choose Send.
• A 403 or Microsoft permission error means the delegated mail grant is missing or expired. Select Grant full access in Settings, Security, Sign-in methods, or reconnect from Connectors when prompted.
• A 429 means the Formist send budget or Exchange throttling limit was reached. Wait for the retry period before sending again.
• An ambiguous send can occur when Microsoft accepted a request but the response was lost. Formist checks Sent Items before deciding whether to retry, which avoids duplicate mail.

Before retrying

Confirm To, Cc, subject, and body; verify the active mailbox; and check whether the message already appears in Sent Items. Do not create multiple copies while delivery is still being reconciled.

The email-code service used for Login is a separate transactional provider. A working Login email does not prove that Microsoft mailbox sending is configured.