paste using paste without formatting (Ctrl+Shift+V) and none of the font information will arrive to be fixed.

Thanks. I'll try that, but does that mean there is no way to select the font size like many other programs do?

Thanks. I'll try that, but does that mean there is no way to select the font size like many other programs do?

Fonts in Thunderbird are described using HTML concepts. Normal and larger and smaller than normal. This allows the receiving client or web page to scale things to readable levels automatically. The concept of numbers is actually a printing concept, not a screen display one. Normally folk think in terms of say 12 points. This is strictly defined as 12/72 of an international inch in height. That is all good, except the reality is that if you have a 72 inch screen or a 4inch one, that is going to display as 12/72 of an inch. Messy to say the least. Microsoft particularly force feed mail with points as they prefer to write reams of code to scales the exacting measures of points than explain to their users that they are a fancy left over from the days of movable type. Oddly the decision makers in many corporations are still not very computer literate and who wants to be telling the $5 million a years CEO he is a dinosaur for demanding his mail use the corporate printing standard. (Except me)

For a little background see what the c3schools suggest in their discussion on CSS fonts https://www.w3schools.com/css/css_font_size.asp (slightly different to specified in HTML, but the HTML stuff was deprecated about a decade ago and Microsoft and other big corporates just will not let it die.)

Maximum compatibility comes from not specifying an actual size and using "larger" for say headings.

Matt,

I can understand your point, but I am creating a marketing email and confirming that all text size is the same is important. Yes, I will use your cut and paste solution, but having the ability to set all text to the selected size, independent of how it comes out on the other end, would be a helpful feature.

Thanks for the help.

Seriously for mail out of more that a dozen emails I would point you to the appropriate tools. Vendors like mailchimp (which the Thunderbird team use and has a free entry level) and campaign monitor are two of the mailing houses that you might want to use, instead of your actual business mail account.

Sending commercial marketing mail in any quantity is a recipe for having your email address marked as a source of SPAM and blacklisted by other mail providers. Hence my suggesting specialist marketing tools, email marketing is becoming very much a specialist field and those using their business servers and accounts frequently have unexpected issues post a campaign.