I use Outlook 2003 with internet-mail only, namely a few Yahoo accounts, via POP3. I recently discovered that, for any email I send from Outlook (via Yahoo SMTP servers), the resulting unique message-id in the header ends in "…@[my local computer name].” I had expected it would end in "…@yahoo.com."
Now, my brother uses Outlook 2016 with a similar setup, namely a few Yahoo accounts, via POP3. Today I checked, and the header message-id for his sent mail does end in "...@yahoo.com" instead.
Is this difference to be expected simply because of Outlook 2003 vs 2016? If not, do you have any idea why my message headers would reveal my local computer name? And, in addition to a bit of privacy concerns, could this make my sent mail more likely to sometimes end up tagged as spam?
Thanks.
Now, my brother uses Outlook 2016 with a similar setup, namely a few Yahoo accounts, via POP3. Today I checked, and the header message-id for his sent mail does end in "...@yahoo.com" instead.
Is this difference to be expected simply because of Outlook 2003 vs 2016? If not, do you have any idea why my message headers would reveal my local computer name? And, in addition to a bit of privacy concerns, could this make my sent mail more likely to sometimes end up tagged as spam?
Thanks.