signed messages being dropped?

[Lorenzo Prince]

I don't know what's going on, but I have the same problem.  I can't sign any message to the Speakup list because it 
simply disappears.

PRINCE

The famous speaker who no one had heard of said:
> Hi all. Is it me or all PGP-signed messages being dropped? Because I
> sent a signed message to another mail account of mine, and I got the
> message fine. However when I send one to speakup at braille.uwo.ca, it
> seems my messages don't get proppogated. I know they get successfully
> delivered because of the success messages indicated by Courier in
> syslog. Does anyone know what's going on here?
> 
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