Manage them what kind and how? I know you think everyone wants to do whatever it is you are wanting to do and the answer should be simple. The rest of us have no idea because you have not actually specified what you are wanting to do.

Have you read the support article? https://support.mozilla.org/en-US/kb/signatures Do you mean something like this addon offers https://addons.thunderbird.net/en-US/thunderbird/addon/signature-switch/?src=search

You might even be asking about s/MIME signatures although that is a less mainstream thing than a general email signature.

Matt, sorry for the lack of specificity.

I set up signatures in TBird and want to know how to manage them so they show up in new emails and also in replies to responses. That's not happening. I hope this clarifies things.

re :I set up signatures in TBird

That needs more clarification as it's very generic and does not tell us how you created the signature. It's not known whether you have made an error with the actual signature creation or whether you have not set up to use it in the manner you prefer.

There are two ways of creating a Signature for a specific account.

A simple text signature such as 'Regards' and 'Name' This is done in 'Account Settings' Select name of account in left pane On the right- in the 'Signature Text' box enter the text as you wish it to be displayed. If you want you can select the checkbox 'Use HTML' Then you also use some HTML formatting eg: set the text you inserted as bold using correct html.

It would be helpful to see an image of what you have done.

Alternative: Create your own more complicated signature.

• Click on '+New Message' to open a new Write window.
• Create the signature as you would like it to display.
• Maybe use a 'Table' to help control the contents and display.
• Then save the file as a HTML file in a suitable location. Such as ...In Documents create a folder called 'TB Signatures' and save any signature files in that location.
• In Account Settings - select name of account
• On the right below the Signature Text box
• Select the checkbox 'Attach the signature from a file instead...'
• click on 'Choose' and locate the HTML file you created.

Did you create your own HTML file and did you use Thunderbird to create it ?

Set up what Thunderbird needs to do with signature for various options.

• Account Settings > Composition & Addressing for the same account
• Select 'Compose messages in HTML format'
• Select 'Automatically quote the original message when replying'
• When quoting select: 'Start my reply above the quote'
• and place my signature select either 'below the quote' or 'below my reply (above the quote)'
• Select checkbox 'Include signatures for replies'
• Select checkbox 'Include signature for forwards' (if you wish this to occur)

It would be helpful if you posted an image showing what you have selected in 'Composition & Addressing' - basically all of the above.

Suggest you also check your sending options.

• Settings > Composition
• Sending Format section

Suggest as you may be including HTML formatting in signature

• Select 'Both HTML and Plain Text'

Note: Signature is account specific, creating a signature in one account does not mean another account has a signature.

IF you have additional identities in a mail account OR have several mail accounts set up separately then each will need to be set up with it's own signature. Although you can reuse a HTML file on any account.