Docs/ Writing & composer

Signatures

A rich signature library, set a default, and choose one per mailbox.

Build a library of rich-text signatures, designate a default, and assign a specific signature to each connected mailbox. You can also switch or remove a signature while composing any individual email.

Building your signature library

In Settings → Signatures you can create as many signatures as you need using a rich-text editor — the same editor used in the composer. Format text, add links, include your logo or headshot, and lay out contact details exactly as you want them to appear.

Give each signature a name (for your own reference) so the switcher in the composer is easy to scan.

Keep a few variants ready

A common pattern: one full signature with title and contact details for external emails, a shorter one for internal replies, and a minimal sign-off for quick notes. Name them clearly so you can switch fast.

Setting a default and per-mailbox assignments

Mark one signature as your global default — it appends automatically to every new compose window unless overridden.

If you have multiple mailboxes connected (personal, work, a shared alias), you can assign a different signature to each. Aiemaily picks the right one automatically based on which mailbox you’re sending from.

Assignment levelHow it works
Global defaultAppended to all new emails unless a mailbox or per-email override applies
Per mailboxOverrides the global default when composing from that specific connected account
Per emailSwitch or remove in the composer; applies only to that message

Switching signatures while composing

Inside the composer, the active signature is shown at the bottom of the compose area. Click it to open the signature switcher, choose a different one from your library, or remove the signature entirely for that message.

Changes made in the composer are per-email only — they don’t alter your saved defaults.

Signature switcher in the composer
Current signature:
Jordan Lee · Acme Corp · jordan@acme.com
Switch to:
1Full (default)
2Brief internal
3No signature

Per-email changes don’t affect your library

Removing or switching a signature in the composer only affects the email you’re writing. Your saved signatures and defaults remain unchanged.

Frequently asked

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