First of all, I would try to remove Gmail as intermediary. Most likely, Gmail rewrites (the HTML of) your email or maybe renders the text part instead of rendering the HTML part.

Find a (trustworthy) mail server where you can access the likely unmodified mail via IMAP or the mail program.

In reply to Re: (OT) Linking to an attachment from within a HTML email by Corion
in thread (OT) Linking to an attachment from within a HTML email by LanX

Title:
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