Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Any email I send in HTML is now delivered as html code.....this started within the last few days

  • 8 replies
  • 1 has this problem
  • 14 views
  • Last reply by DRG2017
  • Solved

If I send a message in HTML...as I have done for years....it now arrives in the form of HTML code

This is what "TEST" shows up like

<meta http-equiv="content-type" content="text/html; charset=utf-8">

TEST

I had not changed anything........ I have switched to plain text since this started but it's very limiting to me and up to now Thunderbird has been working perfectly

If I send a message in HTML...as I have done for years....it now arrives in the form of HTML code This is what "TEST" shows up like <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> <p><font size="+3" face="Arial Unicode MS">TEST</font><br> </p> </body> </html> I had not changed anything........ I have switched to plain text since this started but it's very limiting to me and up to now Thunderbird has been working perfectly

Chosen solution

Which version of Thunderbird? What platform (windows/osx/linux)? What antivirus/firewall?

It is possible that security software is doing this.

I generally run beta test release candidates. I have used both 52 and 53 and I haven't ever seen it mangling html in the way you show here, so I don't really think anything has changed in Thunderbird itself.

Read this answer in context 👍 0

All Replies (8)

Chosen Solution

Which version of Thunderbird? What platform (windows/osx/linux)? What antivirus/firewall?

It is possible that security software is doing this.

I generally run beta test release candidates. I have used both 52 and 53 and I haven't ever seen it mangling html in the way you show here, so I don't really think anything has changed in Thunderbird itself.

52.0.1 (32-bit)

windows 10

McAfee

Do you know if this change coincided with the upgrade to 52.0.1? Do you need to tell McAfee that you have a new version of Thunderbird? Or try disabling scanning of email, both inbound and outbound.

IF I try HTML it will sometimes come through sometimes not but now it's stripping any image I try to attached in the body of the message and that is one of the primary things I need to do when exchanging information with my contacts

I'm not sure how I would "tell" McAfee I have a new version of Thunderbird. I've been using it since win10 was released so it's worked fine through a number of upgrades. This problem just recently started and I have no idea if it's Thunderbirds update or something Microsoft slipped into my computer when I blinked on morning on start up.

All I know *for sure* is I had touched nothing until this started then I had to reset all of my email accounts to plain text ...I just today turned them back to HTML to see how things were working and that's when I discovered that even if I can get a message out and back to one of my other accounts a pasted in image is now being stripped away and I know for dead certain that was not happening a week ago

If you have McAfee in the Thunderbird 'Addon' Extensions then remove it. Stop McAfee scanning emails, both incoming and outgoing..

re :if I can get a message out and back to one of my other accounts a pasted in image is now being stripped away. If you are sending in HTML but reading in Plain Text then the image will be removed and you would only see it as an attachment.

Do you see a black box with broken file image ?

McAfee is not set as an 'Addon' Extensions . Only LIghtning

The image is just not there...no broken file image

Everything is now working again, HTML is now correct and any graphic or illustration is no longer being stripped out.

The only remaining mystery is I have NO idea what changed between today and three days ago that suddenly put everything right