I have been hanging around Thunderbird for a number of years, but have never seen such a thing, you might consider using a template to write to this particularly finicky person.

Personally I would send them plain text emails and when they complained offer the information that the font is chosen by their mail client, you have nothing to say about the font used to display the message. If they don't like it they can change the settings for plain text in their mail client. But I just don't have any patience at all for folks with such a high opinion of themselves and their personal importance that they would even consider telling me what font I should use to communicate with them. I certainly would no go out of my way to comply.

Hi Matt. It's more like this: I am a webdesigner and work for myself and have my own clients, but I also work as a freelancer for a company that has its own clients. And in communicating with those clients I'm asked to use one specific font.

But you're right, there is no way telling what that font will look like on the recipients machine.

If you are sending emails and not specifying the font in the formatting, then they can set up their email client to automatically use whatever font they like.

• Menu icon > Options > Composition > 'General' tab

Under HTML section use the default settings.

• 'Font' : Variable width
• Size: Medium
• Text colour black and background White.

Providing you do not select to change this using the Formatting bar in an email you are composing, then the only hardcoded formatting will be the Text and Background colour.

Then they can choose to Display emails in whatever font they want.

I use this as standard because I do not necessarilly know what Font they like; they may have reading issues with some fonts or may not even have those fonts on their OS. It gives them the choice.

You could send an email with a declaration footer with something like: To improve readibility and offer the choice of font to be displayed to the recipient, this email does not contain specified fonts in the formatting. This benefits the recipient, allowing them to set up their email client settings to display emails using a particular font of their choosing.

Otherwise, as this is business, I can see why you would want to keep someone happy, so your only other option would be to create a Template email preset using the Formatting Bar to use a specific font and then only use it for those clients.

The only way I could see this working would be with you adopting the freelance font, or profile dedicated to accounts for the Freelance work. Less convenient I know.

If you went that way I would suggest you have a look at this addon, it makes the whole switching thing simple as it should be. Instead of using a bunch of arcane command line switches.

https://addons.thunderbird.net/en-US/thunderbird/addon/profileswitcher/

Thank you both for the suggestions. A profile switcher could do the trick, but now I think of it, I wonder if this is going to work for everybody in the team. This company works with more freelancers and a lot of them are not so familiar with these kind of tricks / steps. A template is an option, but still not a guarantee that everyone will see that particular font. I think I will point out to this client that it will be very difficult to achieve.