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Letters replaced with '???' in sent emails

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We are sending(employees) emails with different languages(Arabic, English, German, Turkish and other). However, some of the language sentences turn to '?????' in the emails when clients receive it. Attached screenshot!

I have tried all of the options like changing the fonts in HTML(lang attribute) and using Plain/HTML for message writing. All failed.

It had no issues before. Screenshot URL: https://www.aras-group.ae/wp-content/uploads/2018/02/Error.jpg (It's not uploading in Upload section!)

We are sending(employees) emails with different languages(Arabic, English, German, Turkish and other). However, some of the language sentences turn to '?????' in the emails when clients receive it. Attached screenshot! I have tried all of the options like changing the fonts in HTML(lang attribute) and using Plain/HTML for message writing. All failed. It had no issues before. Screenshot URL: https://www.aras-group.ae/wp-content/uploads/2018/02/Error.jpg (It's not uploading in Upload section!)

所有回覆 (2)

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Try changing our font to something other than Arial

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Same issue. I think because of encryption while sending email? Or Thunderbird doesn't support other languages?