Digital Signatures Again...

Julian Field mailscanner at ecs.soton.ac.uk
Fri May 28 16:33:17 IST 2004


At 15:21 28/05/2004, you wrote:
> > On Mon, 2004-05-24 at 21:55, Max Kipness wrote:
> > > Ok, I did a test to determine that MailScanner was modifying the
> > > emails in some way. I started archiving a test email account. I had
> > > the sender with digital signatures send to that account.
> > When passing
> > > through MailScanner, the digital signature gives the error "The
> > > digital signature on this message is invalid or not trusted". The
> > > details give the error "The message contents may have been altered".
> > >
> > > When checking the same email that was archived, the digital
> > signature
> > > looks fine.
> > Then diff the files and find out how they differ, they must
> > differ in some way, otherwise the signature would be valid.
>
>Ok, when I do a diff, it seems like everything starting with the headers
>has been changed. Every line is shorter on the message that went through
>MS. I don't know if this  matters, but diff is showing it as changed
>between the two. There are obviously headers added by MS.
>
>Is there anyway to tell MS not to scan any messages in anyway from a
>certain sender? Or how else do I deal with this? The person getting
>these signed messages is riding me on this issue.

Disable all the checks for them with a ruleset. See the MAQ for info on
doing this.
--
Julian Field
www.MailScanner.info
MailScanner thanks transtec Computers for their support

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