On Fri, Mar 1, 2024 at 8:46 AM Cyril - ImprovMX via mailop < mailop@mailop.org> wrote:
> > Upon investigation, we discovered that indeed, checking the DKIM signature > was failing because of a body mismatch. Digging further, we discovered that > a dot was removed from the message when going through our servers. > > You're talking about 'dot stuffing'. When you receive a message via SMTP, in the DATA section, if you receive a line that starts with a dot (and has additional characters after that), you remove that first dot. Then, when you send the message back out via SMTP, for lines that start with a dot, you prepend a dot before sending the line on the wire. I am pretty sure that Gmail respects all of this... Mark
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