Logo Image Not showing Up

[jtlswan]

CORRECTION: SORRY>>>WRONG FORUM...will repost in correct section

I'd like to bring this back around again...I've been researching this for the past 2 days with no fix (and I'm probably just being a dumbass and missing something). I'm using 1.5.8 and I'm confused as to if it's the "OEM" email program (i.e. outlook, apple, gmail) that is causing the issue or if it's in the zen cart coding. None of my email logos are showing up (but they are showing up if I put the actual url in the address bar). I've tried changing the header.jpg coding in some, in all, in one, in two, etc of the templates. I just can't seem to figure it out. Please help...