Subject: Undeliverable mail: Вы тогда спросили об этом учебном курсе

From: <[email-masked]>
Date: Tue, 23 Sep 2008 04:11:54 +0200

Failed to deliver to [email-masked]'
SMTP module(domain ramos.nl) reports:
 host mx.is.nl says:
 550 5.1.1 <[email-masked]> is not a valid mailbox