Hi Steve,
Thanks for taking the time to respond.
As to your suggestion: I did as you suggested, creating an email in Gmail and pasting the logo into the body of the message. I sent this message to two separate destinations: one a FengOffice client, and another an email client (Outlook) connected to a standalone hosting account (separate domain).
Sure enough, sending it to the FengOffice client stripped the logo away, leaving the alternate text. Sending it to the standalone hosting account worked fine.
I should tell you that I now have three (3) separate FengOffice installations, one of which is the latest release (v3.4.1), and the others the second-to-last version (v3.4.0.17). They all appear to behave the same way where email is concerned.
Based on the above evidence, and the simple fact that email messages sent between FengOffice installations suffer the same fate, I think the FengOffice installations are somehow at fault. Gmail looks clean.
I honestly thought it would have been a simple setting - maybe SPAM/security-related, but not having any SPAM filter in place at the server end, I've ruled that out.
I have no idea what might be causing this - do you?
Regards,
David