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Some email is gibberish in gmail

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This only appears to have started recently.

It's an email I've sent from Mailchimp and I'm receiving it into my gmail account, but not to my gmail email address.

Every word shows up as a question mark in a box. I've now seen it in another email I've received, not from me.

What is causing this and how do I resolve?

Thanks.

This only appears to have started recently. It's an email I've sent from Mailchimp and I'm receiving it into my gmail account, but not to my gmail email address. Every word shows up as a question mark in a box. I've now seen it in another email I've received, not from me. What is causing this and how do I resolve? Thanks.

Chosen solution

The ? or A in boxes instead of actual characters problem usually is associated either with (A) a particular font being corrupt, or (B) using a third party font manager which stores fonts in a location on disk that Firefox does not make accessible for websites. In those cases, a fallback typeface is used, which often just has symbols.

To check whether it is (B), could you try the "sandbox" setting change mentioned in this thread to see whether it's that issue: https://support.mozilla.org/questions/1197246

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Chosen Solution

The ? or A in boxes instead of actual characters problem usually is associated either with (A) a particular font being corrupt, or (B) using a third party font manager which stores fonts in a location on disk that Firefox does not make accessible for websites. In those cases, a fallback typeface is used, which often just has symbols.

To check whether it is (B), could you try the "sandbox" setting change mentioned in this thread to see whether it's that issue: https://support.mozilla.org/questions/1197246

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Thank you! I made that change and it's all working.

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Thanks, Jam. Most likely this issue is related to using a "third party" font manager (for example, Suitcase Fusion, RightFont, FontBase).

The developers are gathering information about the font managers Firefox users are using so they can accommodate nonstandard font file locations without users having to lower their sandbox security level.

Can you provide any more information about what you use?