Simple mail transfer protocol ( smtp), Computer Networking

Assignment Help:

Simple Mail Transfer Protocol ( SMTP)

SMTP is the principal  application layer protocol for  internet electronic  mail. It uses the reliable data transfer  service of TCP  to transfer  mail from  the sender mail  from the  sender small server the recipient mail  server. SMTP has two sides a client side which  executes on the sender mail server and a server side which executes on the recipient mail  server both  the client  and server sides  of SMTP run on  every mail server when  a mail server  sends mail to other mail  servers it acts  as an SMTP client. When  a mail  server  receive  mail  from other mail  servers it acts as an SMTP  server.

To  illustrate the basic  operation of SMTP let go through  a common  scenario  suppose  heena  wants  to send Harish a simple  ASCII  message to Harish.

1.Heena  invokes her user agent for e mail provides Harish e mail address compose  a message and instructs the user agent to send to message.

2.Heena  user agent sends the message to her mail server wher it is placed in  message  queue.

3.The client side of SMTP running  on heena  mail server see the message in the message queue. It  opens TCP connection to an SMTP server  running on Harish  mail server.

4. After  some initial  SMTP handshaking the SMTP receives the message Harish  mail server then  places the message in Harish mail box.

5.Harish  invokes  his  user agent  to read the message at his convenience.

 

 

 


Related Discussions:- Simple mail transfer protocol ( smtp)

Verify network connectivity- ccna, Verify Network Connectivity Step 1: ...

Verify Network Connectivity Step 1: Use the ping command to determine network connectivity. You can determine network connectivity using the ping command.  Note: If pings

Tqm in design manufacturing, Quality assurance through statistical methods...

Quality assurance through statistical methods is a key component in a manufacturing organization where TQM generally starts by sampling a random selection selection of th

Error detection in lrc - performance, LRC - Performance Detects ev...

LRC - Performance Detects every burst errors up to length n (number of columns) If two bits in one data unit are damaged as well as two bits in exactly same positions

Classify different types of ip routing, INTERNETWORKING - TCP/IP 1. Sta...

INTERNETWORKING - TCP/IP 1. State the following terminologies: a) Node b) Router c) Host d) Subnet e) Network 2. What do you understand by IEEE 802 Local Area network 3.

Describe a typical dns system, Question: (a) With the help of a diagra...

Question: (a) With the help of a diagram, describe a typical DNS system. (b) Using signal sequence or state transition diagrams, illustrate the following scenarios: i.

Identify three udp characteristics, UPD is a layer 4 Transport protocol. It...

UPD is a layer 4 Transport protocol. It is connection-less due to it does establish a connection thus the 3 step handshake is not needed, it does NOT execute any flow control or ac

Create and simulate a network - netml system, Create and simulate a network...

Create and simulate a network similar to the one shown here, using the NetML system. The network is a little more complex, as depicted at the right. There is an extra node

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd