It is possible that the wrong encoding is selected.

They can check the encoding to make sure that the proper encoding is selected like Unicode UTF-8 or an 8 bit Windows cq ISO encoding.

• Firefox > Web Developer > Character Encoding
• View > Character Encoding

Dear Mozilla Support Team,

I'm sorry but this answer is not helpful for me. I understand about encoding you mentioned, but my problem is not about encoding. When I receive an email from anyone by Vietnamese language, it's good and I can read it normally. If I reply or forward this email again (by using "reply" or "forward" button in outlook web access interface), all previous content of this email will be error. That means I can send or receive an email by using outlook web access in firefox normally, but I can't reply or forward an email, it'll be error about font. This error only appears in firefox and chrome, ie is not. So I hope you can guide me to fix this problem, actually we're fan of firefox browser. I also attached two image files for you to further understand about my trouble.

Thank you very much for your quick response!

I still think that this can be an encoding issue and that the body text is in Unicode, but the page code is different.
Another possibility is that a font is used that doesn't include those missing glyphs.

Which encoding is selected to display those pages in OWA?

These seem to be missing: ệ (ệ) and ộ (ộ)

• http://en.wikibooks.org/wiki/Unicode/Character_reference/1000-1FFF
• http://en.wikibooks.org/wiki/Unicode/Character_reference/0000-0FFF

Can you send any messages to yourself as a test that keep all the characters?

See also:

• http://en.wikipedia.org/wiki/Windows-1258

I'm using Western (ISO-8859-1) Encoding in (Firefox/Web Developer/Character Encoding/) for my outlook web access. For simple,I think I'll create for you a test mail in my company, then you can test in this email. The log in information as following:

=================================================

Webmail: mail.pvi.com.vn User: mozillatest@pvi.com.vn Pass:123456

=================================================

I'll send you a Vietnamese font mail to this email address, then you try to reply to me, you can realize this font error.

Thanks,

Looks fine here on Linux.

Send with:

• Encoding: ISO-8859-1

Meta tag in document:

• text/html; CHARSET=iso-8859-1

There is no font specified, so the default is used.

• Tools > Options > Content : Fonts & Colors > Advanced

You can a different default font to see if that helps, in case that the currently selected font doesn't have all the glyphs.
I'm using Verdana as the default font, but a font like Arial should work as well.

You can test this in the above posted Unicode Wikipedia pages.

You may need to uncheck this while testing:

• Tools > Options > Content : Fonts & Colors > Advanced > [ ] "Allow pages to choose their own fonts, instead of my selections above"

(middle-click View Image via the right-click context menu to see the image more clearly)

Tôi hy vọn
g bạn có t
hể giúp tô
i giải quy
ết được vấ
n đề lỗi f
ont trong 
trường hợp
 sử dụng w
ebmail trê
n trình du
yệt firefo
x này.

Seems that I misunderstood the problem.

I see indeed the "?" if I click the reply button to send the message.

A Copy and Paste of the text from the inbox window to the reply window works, but another reply fails again.
So it looks that OWA isn't able to interpret the original text properly and copy the text to the reply editor.
As it looks now then there is not much to do about this apart from the copy and paste that I did.

Thanks for your support, I see your idea. If it's possible, please try to help me to fix this problem asap because this error doesn't happen in ie.

Regards,