-1999-03-02 09:44:33 10HmaZ-0005vi-00 <= CALLER@testhost.test.ex U=CALLER P=local S=sss for b@test.ex
-1999-03-02 09:44:33 10HmaZ-0005vi-00 => b@test.ex R=to_server T=remote_smtp_dkim H=127.0.0.1 [127.0.0.1] K C="250- 8524 byte chunk, total 9175\\n250 OK id=10HmbA-0005vi-00"
+1999-03-02 09:44:33 10HmaZ-0005vi-00 <= sender@testhost.test.ex U=sender P=local S=sss for b@test.ex
+1999-03-02 09:44:33 10HmaZ-0005vi-00 => b@test.ex R=to_server T=remote_smtp_dkim H=127.0.0.1 [127.0.0.1] K C="250- 8520 byte chunk, total 8848\\n250 OK id=10HmbA-0005vi-00"