The sender was using Thunderbird, sending mail through their ISP's SMTP server. Hotmail was not involved.
When I got home, I downloaded the message using Thunderbird and GMail's POP server. The digital signature is just fine when I download it that way. Thunderbird reports the signature as invalid only if I download the message using the Webmail extension. It may be that the extension is modifying the message in some trivial way (e.g., deleting a trailing space) that renders the signature invalid. On Jan 6, 3:00 pm, KE4AVB <[email protected]> wrote: > Gil, > > Your sender would not happen be use of the free Hotmail service would > they? I have had problems sending signed and/or encrypted messages > through their service. They are opening and adding Hotmail taglines to > the messages sent thought their service thus invaliding the signatures > and encryptions. The same problem could be happening to other service > providers depending how they operate. The Hotmail problem occurs if I > use the online webmail or not. > > Eugene > > On Jan 6, 3:45 pm, Gil <[email protected]> wrote: > > > Should the Webmail extension (with GMail - actually GAFYD) play nice > > with S/MIME and digital signatures? > > > I have received some signed emails using the Webmail extension, and > > Thunderbird is telling me that the signature is not valid (message has > > been modified). > > > Other recipients of the same message report no problem with the > > signature - they do not use the Webmail extension but just basic POP. > > > I can't try the same, as I am behind a corporate firewall and cannot > > use POP. > > > It does seems that I am able to receive some emails via the Webmail > > extension with valid signatures. Only one sender seems to be affected > > so far. It may be that senders using plaintext for their messages are > > not affected, but those who compose using HTML may have their messages > > corrupted (by the Webmail extension?). > > > I am using: > > - TB 2.0.0.23 > > - WebMail 1.3.5 > > - WebMail - GMail 0.6.5b1
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