This document discusses several email and messaging protocols: - SMTP is used for sending and receiving basic email over TCP/IP networks. IMAP allows accessing a central email repository from multiple devices so emails are stored on the server. POP3 stores emails on a single device. - SMS (Short Message Service) enables short text messages up to 160 characters between mobile devices, while MMS (Multimedia Messaging Service) extends this to include multimedia content like images.

1. E-MAIL PROTOCOLS
Internet Mail access Protocol
Secure Sockets Layer ProtocolSimple mail Transfer Protocol
Post Office ProtocolProtocol

2. SMTP-Simple Mail Transfer Protocol
• The standard protocol for email services on a
TCP/IP network
• SMTP is a delivery protocol only
• Used in sending and receiving e-mail.

3. IMAP-Internet Mail Access Protocol
• Designed to help the user to who uses
multiple computers.
• A PC at home,a Laptop in office, a
Handset carrying with him.
• A central mail repository can be accessed
by anywhere.

5. • Reading Mail
• Removing Mail
• Handling Email Headers (headers such as the
FROM, TO and DATE headers)

6. IMAP Vs POP
• IMAP (Internet Messaging Access Protocol)
• Emails are stored on the server.
• Sent messages are stored on the server.
• Messages can be synced and accessed across multiple devices.
• POP3 (Post Office Protocol)
• Emails are stored on a single device.
• Sent messages are stored on a single device.
• Emails can only be accessed from a single device.
• If you want to keep messages on the server, make sure the setting
"Keep email on server" is enabled or all messages are deleted from
the server once downloaded to the app or software.

8. Wireless/Mobile communication protocols-
SMS(Short Message Service)
• Text Message
• Enable mobile devices to exchange short text messages.
• It is a method of communication that sends text between cell
phones, or from a PC or handheld to a cell phone.
• The "short" part refers to the maximum size of the text messages:
160 characters (letters, numbers or symbols in the Latin alphabet).
• 140 when cyrillic characters(based on greek alphabet),70 characters
when UCS2 (unicode)characters coading.

9. Wireless/Mobile communication protocols-
MMS(Multimedia Messaging Service)