The -- has been around for decades as a separator between text and signature. The intent was a pseudo-standard that allowed email clients to automatically remove sigs on replies to avoid clutter of seeing a sig multiple times on a long thread. More info on that is here: https://mailformat.dan.info/trailers/sigblocks.html

You can permanently remove it from instructions on this site below:

https://kb.mozillazine.org/Signatures_-_Thunderbird#Removing_the_signature_separator

Oh, okay. Been using Outlook and hardly used it (no heavy office use). Thought it was a weird Thunderbird feature.

I did find an article that said something about "mail.strip_sig_on_reply" but you know the actual proper setting: mail.identity.default.suppress_signature_separator

Thanks for the assistance David and the back info. If I ever come across "--" again, I'll know what it's for.

The -- has been around for decades as a separator between text and signature. The intent was a pseudo-standard that allowed email clients to automatically remove sigs on replies to avoid clutter of seeing a sig multiple times on a long thread. More info on that is here: https://mailformat.dan.info/trailers/sigblocks.html You can permanently remove it from instructions on this site below: https://kb.mozillazine.org/Signatures_-_Thunderbird#Removing_the_signature_separator

I was glad to assist.

Note, standard signature separator requires a trailing space.