cdg broken aliases (Fwd: Undelivered Mail Returned to Sender)

[Elan Ruusamäe]

hi

what should be done with cdg members whose alias bounces?

<adasi at grubno.da.ru> (expanded from <adasi at pld-linux.org>): host
     grubno.da.ru[85.10.219.146] said: 554 5.7.1 <adasi at grubno.da.ru>: Relay
     access denied (in reply to RCPT TO command)

<dzimi at d2.net.pl> (expanded from <dzimi at pld-linux.org>): Host or domain name
     not found. Name service error for name=d2.net.pl type=AAAA: Host 
not found

<marcin at dolinski.org> (expanded from <averne at pld-linux.org>): host
     smtp.secureserver.net[216.69.186.201] said: 550 #5.1.0 Address rejected
     marcin at dolinski.org (in reply to RCPT TO command)
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