.gif in email message do not forward. They become attachments

[Guest]

When I receive messages that have .gif animinations and I 'forward" the
message, the .gif picture becomes an 'Attachment". Pictures don't stay with
the message. Why?

 

[Guest]

Are you sending email in Plain Text?

 

[Guest]

My apologies, that should read Rich Text Format.

 

[Guest]

I send in HTML.
--
Thank you,

My apologies, that should read Rich Text Format.