outlook 2010: random font changes, missing email content, source html displayed in-line with text

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I'm wondering if anyone has seen this problem before. We recently upgraded our Office 2000 install to Office 2010. Since then, we've been seeing some problems with some of the emails that have been sent from Outlook 2010. We're seeing the following behavior:

random font changes . text will be in arial and then switch to other fonts like times roman

missing email content . email content that was typed into the message is randomly removed (full lines of text) - sender receives a different message from what was sent.

source html displayed in-line with text .

Example ('xxx' are edits to maintain privacy):

INTE! RIORS INC ont-size:10.0pt;font-family:" Arial" ," sans-serif" ;mso-fareast-language:EN-CA'> Suite xxx xxx xxx xxx

Should read:

INTERIORS INC Suite xxx xxx xxx xxx

These problems are concerning as they are typically communications with clients. These are basic html emails with no QuickParts, SmartArt or other embedded within the email.

We've tried the following:

rebuilding signatures from scratch (have found a number of examples where signatures are formatted incorrectly and wanted to make sure it wasn't a copy/paste issue from a previous signature)unchecked " reduce message size by removing format information not necessary to display the message" in advanced features in case the functionality isn't working properly (just tried this yesterday, assessing if there is a difference in behavior)

If anyone has any suggestions, please let me know.


Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
HTML in the message body is usually the result of a corrupt message due to an antivirus scanner.

missing content can be the result of typing in the signature field - if the last lines disappear. This would not be the cause of lines in the middle disappearing.

Does it work better in safe mode? (Hold Ctrl as you click on the Outlook icon to start in Safe mode.)If so, what addins are installed?



Hi Diane, thanks for the note. I'll give your suggestions a try and come back with a response (it will be delayed though). As far as I know, there aren't any add-ins but I will check.


The exclamation mark is indicative that the email program has forced a linebreak in your code. My guess is that your signature file includes long lines in it. Outlook is then adding a linebreak (with exclamation point) which has the effect of corrupting any HTML which it breaks up.

Solution: ensure that the signature file does not have lines longer than 76 chars. Crappy I know, but it should work. Since it's an HTML signature a linebreak should not have a visible effect (it will be treated as a single space) but if this is a problem, you can always add the linebreak inside a tag like this:

click this <a href=" site.htm" >link</a>

click this <a

href=" site.htm" >link</a>

Since the linebreak is inside an HTML tag it should then have no effect on the display of the signature at all.
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