An Email Sender is the account Airstudio sends email through. Set one up under Settings › Notifications › Email Senders, then every notification uses it unless you choose otherwise. Sending from your own domain keeps your messages out of spam folders and lets replies come back to you.
| Type | Best for | What you need |
|---|---|---|
| SMTP | Any mail host that offers SMTP credentials, or a transactional service such as SendGrid | Host, port, username, password, and whether to use TLS or SSL. For SendGrid, add the verified SendGrid sender address. |
| Gmail | Google Workspace or a Gmail address | Click Sign In With Google and grant send permission. No password is stored. Gmail addresses must use this type, not SMTP. |
| Microsoft | Microsoft 365 and Exchange Online | An Azure application registration: Client ID, Tenant ID, and Client Secret, plus the mailbox address to send from. |
Airstudio validates the credentials when you save. A sender that fails validation is marked invalid and will not be used; the notification falls back to the default sender.
One sender is marked Default. Every notification uses it unless the template's Email Sender field selects another. Use this to send invoices from accounting, employee notices from operations, and marketing from the studio's public address. Set All Notifications To Default resets every template back to the default sender in one step.
Studios with several teams (regions) can give each team its own sender. Turn on Use Team Notifications in Studio Info, then assign a sender to each team on the Teams tab. A template set to Use Team Email Sender picks the sender for the recipient's team at send time. Copy To All Teams on a sender creates a matching sender for every team.
Mail providers limit how fast you may send. Each sender has Emails Per Batch and Seconds Per Batch, and Airstudio releases mail at that pace. The defaults are safe for most SMTP hosts. Gmail and Microsoft senders are locked to their providers' published limits, shown on the form, and cannot be raised. If a large campaign seems slow, this pacing is why; it is protecting your sending reputation.
An employee can have their own sender on their profile so that emails they send by hand come from their address. Templates and on-demand sends offer Send From Your Email when the signed-in employee has a valid personal sender. Automatic notifications never use a personal sender; they always use the studio or team sender. See Employees › Personal Email Sender.
Deleting a sender that templates still use reassigns those templates to the default. The confirmation tells you how many templates are affected. The default sender itself cannot be deleted until another is made default.
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If your main sender is a SendGrid account, any employee personal senders must also be SendGrid sub-accounts under the same verified domain, or their mail will be rejected.
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