[gabereiser]

base64 encoded <img src"<base64>">...

It's the only way to ensure you're logo is forwarded to every single CC and BCC.

edit I take it all back, gmail strips them. I guess as an attachement and then referenced like <img src="cid:<id>">

[javitury]

Gmail does not support base64 images according to caniemail

https://www.caniemail.com/features/image-base64/

The most reliable method is to attach a png image to the email and reference it from the body using `<img src="cid:insert_cid_ref_here" `