signed messages being dropped?

[Igor Gueths]

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?