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<lsmothers@example.com> SMTP 0<001501c4db9b$db8b2680$2d01a8c0@ryand9v889t9uc> ... Header2: <headertwo@example.com Received: from server.cluster1.example.com ([10.20.201.160]) line 12
$ cat sample.txt | perl -wnl -e '/\.X\-Intermail\-Unknown\-MIME\-Type\ +=unparsedmessag(e.*)/s and print $1;' e