1.6 (2) Configuring Email on Mobile Devices

Question 1

What is POP3?

Answer 1

Post Office Protocol

• Email protocol used to RETRIEVE email and DL it to a local client.
• Downloads the email message from the ISPs account.
• You have the option to delete that message from the server
• Authentication: Name of POP3 server, Username and Password
• Software might require a port no. that’s in use for the POP3 communication.
• Legacy Protocol
• POP3 port: tcp/110
• SSL POP3S: tcp/995

Question 2

What is IMAP4?

Answer 2

Internet Message Access Protocol

• RETRIEVE messages but leave them stored on a central server
• Can perform searches on the server using this protocol
• Authentication: Name of the IMAP server. Username and Password
• IMAP port: tcp/143
• SSL IMAPS: tcp/993

Question 3

What is SMTP?

Answer 3

Simple Mail Transfer Protocol

• SENDS email from local device to your ISP’s SMTP server
• Must be from a trusted device. Authentication is usually involved.
• Authentication: May be different credentials than the incoming mail.
• SMTP port: tcp/25
• SSL SMTP: tcp/587

Question 4

How does Microsoft Exchange work?

Answer 4

It is an enterprise email system

• More than just email. Synchronizes Contacts, Calendars, Reminders,
• Integrates with mobile device database, can synchronize contacts, calendars, etc..
• Configuration options: Provide an email Address, Specify the exchange Server name, Domain, Username and Password
• Provides encryption: Using S/MIME. Allows to encrypt and digitally sign the messages that are sent/receive from Microsoft exchange

Question 5

How do Commercial Email Providers work?

Answer 5

• You may not be directly receiving mail from a server from your ISP
• These are integrated services, such a Google mail and Yahoo mail.
• Google allows IMAP4 and POP3
• Exchange allows IMAP4 and POP3
• iCloud Mail IMAP4 only
• Yahoo Mail IMAP4 and POP3