This makes sending emails a lot easier. Any ideas? If your email message contains an ISGT Signature, it is automatically signed and delivered with your message. You cannot add an ISGT Signature to an email message without first turning off this setting. How do you disable ISGT signatures? — Apple General Discussion Sep 23, 2023 — For example, in the Send tab of the Preferences, turn off the signature button in the Send tab. Also change your signature back How do you disable signatures in Mail on Mac? When Send via Mail option is checked in the Send tab of the Preferences, you can add a custom signature to emails. This is also known as IMAP-To-SMTP (to Apple Mail) Sep 23, 2023 — I've tried to add an ISGT Signature, but nothing happens. Can you add ISGT signatures using the Exchange and POP3 settings? Sep 27, 2023 — You need to set the “Incoming Address Verification” address in your SMTP settings to an SMTP server address that is NOT your own domain (i.e. 127.0.0.1 in the example). Then in Outlook, go to Advanced > Address Verify & Verify ... Sep 6, 2023 — Can I disable this signature on a single email? Can I Disable the Signature in Mail on Mac — Apple Community Dec 5, 2023 — I'd like to use this feature for personal purposes, but I can't sign emails? How can I change the setting and remove this signature? If you want to remove the ISGT signature from a particular mail sent by your server, follow these steps: In Settings, click Mail, then Mail Messages. Select the message, and then scroll to the bottom of the page. Click the signature area where the signature is written. Click the Remove signature... command. Why can't I remove the signature from mail sent by someone else? If you haven't already done so, you can add a signature to each mail sent by a signatory. This will allow you to sign emails from accounts other than your own. To do this, go to Settings, mail, and then Mail Messages. Select the message, and then scroll to the bottom of the page. Click on mail notifications and then Signatures. Click on the arrow next to the mail account name to add a signature to that sender's mail.