Ncc@s\dZddlZddlZejdejZejdejejBZdZdS(sSomething which claims X-Mailer: What the heck is this thing? Here's a recent host: % telnet 207.51.255.218 smtp Trying 207.51.255.218... Connected to 207.51.255.218. Escape character is '^]'. 220 X1 NT-ESMTP Server 208.24.118.205 (IMail 6.00 45595-15) iNsoriginal message followss ( # several different prefixes user\ mailbox[^:]*: # have been spotted in the |delivery\ failed[^:]*: # wild... |unknown\ user[^:]*: |undeliverable\ +to |delivery\ userid[^:]*: ) \s* # space separator (?P[^\s]*) # and finally, the address cCs|jdd}|jds%dSi}xXtjj|D]D}tj|rWPntj|}|r>d||jdq>W|j S(Nsx-mailerts s