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*,DOMAIN\donotreply,authenticated >,235 2.7.0 Authentication successful, <,MAIL FROM: <applicants_email_address@their_domain.com>, *,08D3D15AAC2344AA;2016-09-02T15:31:08.310Z;1,receiving message >,250 2.1.0 Sender OK, ,RCPT TO: <LEGIT EXCHANGE USER>, >,250 2.1.5 Recipient OK, <,DATA, >,354 Start mail input; end with <CRLF>.<CRLF>, >,550 5.7.1 Client does not have permissions to send as this sender, <,QUIT, >,221 2.0.0 Service closing transmission channel,