Compatibility

Apple Mail on macOS renders Sigent signatures with high fidelity — tables, inline styles, colors, and images all work. Apple Mail on iOS picks up the same signature via iCloud sync if you have iCloud Mail enabled, but iOS Mail composes HTML in a more constrained way and some advanced CSS may degrade. POP and IMAP accounts both work; the signature lives locally per account on macOS.

Before you start

• Open Apple Mail (Mail.app) on macOS.
• Confirm your account is added in Mail → Settings → Accounts.
• Have your Sigent.ai install link ready.

Steps

1. Open your install link and click Copy to clipboard.
2. In Apple Mail, choose Mail → Settings → Signatures (or Mail → Preferences → Signatures on older macOS).
3. Select the account on the left.
4. Click + below the middle pane to create a new signature.
5. Click into the signature preview area on the right and paste with Cmd + V.
6. Uncheck Always match my default message font at the bottom. This is critical — leaving it checked overrides your signature’s styling with the system font.
7. Drag the new signature from the middle pane onto your account name (left pane) to associate it.
8. Under Choose Signature, select your new signature so it’s used by default for that account.
9. Close Settings. Compose a new email to verify the signature appears.

Verify your signature

Send a test message to yourself. Open it in Apple Mail and in Gmail Web. Both should render identically. The signature is stored in ~/Library/Mail/V*/MailData/Signatures/ as a .mailsignature file — if you ever need to debug, you can inspect the HTML there directly.

Troubleshooting

• Signature font reverts to system default. You forgot to uncheck Always match my default message font. Re-open Mail → Settings → Signatures and uncheck it.
• Signature isn’t appearing on new emails. Check that the signature is associated with the right account (drag it onto the account name in the left pane), and that Choose Signature dropdown shows your signature name.
• iCloud sync doesn’t propagate the signature to iOS. Signatures sync only if you have iCloud Mail enabled and the same account is configured on both devices. If iOS shows the wrong signature, manually paste from the install link on iOS too. On iOS: Settings → Mail → Signature.
• Images appear as attachments instead of inline. Apple Mail occasionally treats embedded images as attachments when the recipient’s client can’t display them. Sigent’s images are referenced by URL (not embedded as base64) to avoid this — but some legacy IMAP servers re-process the message. If this happens, host images on a CDN with proper CORS and Content-Type: image/* headers.
• Multiple accounts each need their own signature. Apple Mail signatures are per-account. Drag the same signature to each account if you want one identity across all of them, or create distinct ones via additional install links from your dashboard.
• HTML formatting is lost on reply. Apple Mail respects the original sender’s reply style. If your recipient uses plain text, replies will lose formatting. This is a recipient setting, not a Sigent issue.

Notes

Apple Mail’s storage path (~/Library/Mail/V*/MailData/Signatures/) is useful for backups but should not be edited manually — Mail re-syncs from the Settings pane on launch. Drag-and-drop association is the supported workflow.

Need help? Contact support — we usually respond within 24 hours.