PART-D: Emailing to a user not in system

18. In Montreal send an email to a user who is not in your montreal and SCREENSHOT the error message in log file

19. In Toronto send an email to a user who is not in toronto and SCREENSHOT the error message in log file

20. In Toronto send an email to a user who is not in montreal and SCREENSHOT the error message in log file

i already posted part A & B, this is part C, also going to upload part D, E & F separately, i need commands and steps for each part. thanks.

mentioning the names of parts: (for reference)

PART-A : CENTRAL MAIL SERVER and REMOTE HOST/System configuration

PART-B: MAIL REDIRECTION

PART-C: Restricting emails.

PART-D: Emailing to a user not in system

PART-E: Email Colloboration

PART-F: Email Access Control