Several of my users are reporting this issue lately, starting a few days ago. In general, when a user sends/receives an e-mail, sometimes the font of part of the message is set to 100pt *after* it is sent/received.
Everything is normal when they compose the message, but after it is sent the recipient reports that the font is HUGE. If the recipient replies, my users see their original message in 100pt font.
Additionally, the only text affected is the body of the message - not the summary header info or other replies in the thread. Signatures are also unaffected.
If I open the users' mailboxes on my system, I see the same exact problem.
Viewing the source of the message yields the familiar MS HTML clutter, with "...font-size:100.0pt..." tags around the affected text.
OWA does not exhibit the issue. However, I'm not sure this is relevant.
We use Outlook 2003 on XP Pro with Exchange 2003 on 2003 Standard. All systems are fully patched, and no systems are experiencing unusual load or other odd behavior. Mail is filtered through GFI MailEssentials (v14) and MailSecurity (v10), in SMTP gateway mode.
Any help is greatly appreciated.