+>>> RSET
+??? 250
+<<< 250 Reset OK
+>>> MAIL FROM:<CALLER@bloggs.com>
+??? 250
+<<< 250 OK
+>>> RCPT TO:<a@test.ex>
+??? 250
+<<< 250 Accepted
+>>> DATA
+??? 354
+<<< 354 Enter message, ending with "." on a line by itself
+>>> DKIM-Signature: v=1; a=rsa-sha1; c=simple/simple; d=test.ex; h=from:to
+>>> :date:message-id:subject; s=sel; bh=OB9dZVu7+5/ufs3TH9leIcEpXSo=; b=
+>>> CoaRNB2Z59hSnhTzT8bYbMIN3P57XAVcFeV5oGEl4aKmhm6Mtu2uIc7B2z9k5+A/
+>>> +KFIE9HRj7eg9kPzagoPIvI84WE5PN5yRehMjJI6WqhM3V+bQDHkb8ubSmiaYxY5
+>>> B2Pd/kEGgHUlMDB0Hug4FMMt7GcFxagKspthOT/Pso0=
+>>> From: mrgus@test.ex
+>>> To: bakawolf@yahoo.com
+>>> Date: Tue, 2 Mar 1999 09:44:33 +0000
+>>> Message-ID: <qwerty1234@disco-zombie.net>
+>>> Subject: simple test
+>>>
+>>> This is a simple test.
+>>> .
+??? 250
+<<< 250 OK id=10HmaY-000000005vi-0000