OS X Mail: Set minimum font size for HTML

When receiving e-mails containing HTML code in OS X Mail, you will notice that some e-mail messages comes with very small text. With this default write command it’s possible to set the minimum font size for text in HTML e-mails. In some cases changing the size of text will break the layout.

Use the following command:

defaults write com.apple.mail MinimumHTMLFontSize 12

Show current font size:

defaults read com.apple.mail MinimumHTMLFontSize

0 = default

Revert to the default setting with:

defaults delete com.apple.mail MinimumHTMLFontSize

5 thoughts on “OS X Mail: Set minimum font size for HTML

  1. Hi, I tried this and it doesn’t work but returns the message:
    unknown-70:56:81:94:2d:fb:~ FCP2$
    which probably means that I’m working in the wrong directory or something. My user account is FCP2. I’m sorry but I don’t know how use Terminal.

    It would be great to get this sorted, as the size text I receive on some e-mails is almost microscopic Best wishes John

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