[imp] dash in address-name -> bug in imp?

[Peter Meier]

Hi

if I receive emails with the following from field:

From: foo:bar <foo at bar.com>

the sender gets shown as Invalid Address.

I wondered if this is a bug in imp or the sending mailer  
(thunderbird). If the sender places brackets around the name I receive  
the following, which get's displayed correctly:

From: "foo:bar" <foo at bar.com>

I was unsure whether to file a bug report against imp or thunderbird.

Either sending it without bracket is RFC conform, so bug in imp or  
not, so bug in thunderbird. Any ideas which one of the two it is?

cheers pete