Submit your answers sheet as one PDF file.

Q$1.$ After sending an email to

salim@yu$.$edu.sa$,$ the following email is received:

Mail Delivery System

MAILER$-$DAEMON@cloud.vadesecure.com A issamjabri

This is the mail system at host

mta$07-$relay.cloud.vadesecure.com.

I$\text{'}$m sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster:

If you do so$,$ please include this problem report. You can delete your own text from the attached returned message.

The mail system

salim@yu$.$edu.sa: host

yu$-$edu$-$sa$.$mail.protection.outlook.com$[52\mathrm{.}101\mathrm{.}73\mathrm{.}2]$ said: $5505\mathrm{.}4\mathrm{.}1$ Recipient address rejected: Access denied.

$[$AM$1$PEPF$000252$DA$.$ eurprd$07.$prod.

outlook.com $2024-11-22$T$13$:$35$:$27\mathrm{.}574$Z $08$DD$0914502$B$67$B$4]($in reply to RCPT TO command$)$

a$.$ Explain what happened. $[1\mathrm{.}5$ Marks$]$

Q$1.$ After sending an email to

salim@yu$.$edu.sa$,$ the following email is received:

Mail Delivery System

MAILER$-$DAEMON@cloud.vadesecure.com A issamjabri

This is the mail system at host

mta$07-$relay.cloud.vadesecure.com.

Im sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so$,$ please include this problem report. You can delete your own text from the attached returned message.

The mail system

salim@yu$.$edu.sa: host

yu$-$edu$-$sa$.$mail.protection.outlook.com$[52\mathrm{.}101\mathrm{.}73\mathrm{.}2]$ said: $5505\mathrm{.}4\mathrm{.}1$ Recipient address rejected: Access denied.

$[$AM$7$PEPF$000252$DA$.$ eurprd$07.$ prod.

outlook.com $2024-11-22113$:$35$:$27\mathrm{.}574$Z $08000914502867$B$4]($in reply to RCPT TO command$)$

a$.$ Explain what happened. $[1\mathrm{.}5$ Marks$]$