Hello there Ian .Pickett. We have read your message We try to help you. The latest signature add on. 78.0 Thunderbird. https://addons.thunderbird.net/en-US/thunderbird/addon/signature-switch/?src=search Hello guys there. Please read this document. https://support.mozilla.org/en-US/kb/signatures#w_signature-position Follow the instructions of the document. Let me hear from you. https://www.mail-signatures.com/articles/how-to-set-up-email-signature-in-thunderbird/ (Scanned by) Try changing the signature size settings. Some email clients do not open the image signature even if the size does not meet the requirements of the computer Software. Greetings Firefox volunteer.

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.