Send through Gmail, Microsoft 365 or any SMTP mailbox
The email comes from a person's own account, so replies come back to them.
Mailboxes
| Provider | Address | State |
|---|---|---|
| Gmail | sales@fernbank.example | Connected |
| Microsoft 365 | support@fernbank.example | Connected |
| SMTP | billing@fernbank.example | Needs reconnect |
The SMTP mailbox's password was changed; reconnecting keeps its id.
Each kind keeps its own Sent copy
The person finds what was sent for them where they would look for it.
| Mailbox | Connects with | Sent copy |
|---|---|---|
| Gmail | consent | filed by Gmail |
| Microsoft 365, Outlook.com | consent | saved by Microsoft |
| Any other | SMTP and a password | IMAP, when given |
Consent comes back within minutes
The consent link lasts 10 minutes and returns to an address you choose.
https://app.fernbank.example/settings?mailbox=019a2b3c-4d5e-7f60-8a9b-0c1d2e3f4a70&mailbox_status=connected
SMTP mailboxes are tested and need TLS
A test login runs before anything is saved, and a server without TLS is refused before the password goes.
- Port
587, STARTTLS- Test login
- passed
- Sent folder
Sent, over IMAP
The same rules as every send
Suppressions, idempotency, scheduling and templates all apply.
{ "via": { "mailbox": "019a2b3c-4d5e-7f60-8a9b-0c1d2e3f4a70" } }Reconnecting and your own app
Reconnecting
A mailbox that loses its sign-in asks to reconnect.
Your own app
People consent on your Google or Microsoft app's own screen.
Guide
Consent, SMTP settings and reconnecting.
Questions
Do I need a verified domain?
No. The mailbox's provider vouches for the sender.
How many mailboxes per project?
Up to 50.
How large can one email be?
Up to 25 MB through Gmail and 3 MB through Microsoft; an SMTP server sets its own limit.