I’m assuming you are on about the iFrame tag although you don’t state what.

If it is an iFrame tag, wait until you get bit on the a** by a malicious one and you won’t say they are totally unnecessary.

The iFrame tag in normally seen on web pages and is a very powerful function, it can import and run applications, etc. Now some emails use iFrames for advertising, etc. but there is nothing in the email that would say what might be run in an iFrame tag so it could as easily be malicious as it could an advert.

So if you can be a little more detailed about the origin and content of the email and perhaps we can come up with a solution ?