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What are Port 110 and Port 25

Hi Experts,

Can someone please explain to me in basic terms what Port 25 and Port 110 are and used for.

Many thanks in advance for you help.

Angela
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ANGELA11
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ANGELA11
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1 Solution
 
Lee W, MVPTechnology and Business Process AdvisorCommented:
They are used for your e-mail.

SMTP which transfers mail between two systems uses port 25.

POP3, which most people use to deliver their mail from the server to their local computer, uses port 110.

Reference:
http://en.wikipedia.org/wiki/SMTP
http://en.wikipedia.org/wiki/Post_Office_Protocol
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liamkellycabraCommented:
IN BASIC TERMS

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Lee W, MVPTechnology and Business Process AdvisorCommented:
Exactly - you can't get much more basic than the first part of my comment - to repeat:

SMTP which transfers mail between two systems uses port 25.

POP3, which most people use to deliver their mail from the server to their local computer, uses port 110.
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liamkellycabraCommented:
sorry hit returen...

anyway

in basic terms...

A port is a vertual connection on an IP address. where a service is associated with a port number and is considered standard. Such as port 25 = SMTP or Email.

 
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liamkellycabraCommented:
Angela
sorry in advanced,
This is not so basic.

I noticed you are working on many Email problems...so

this should be helpful in gaining an understanding of the Emails process and whats going on.

I recommend not reading it but print it out and put it up on you desk (learn by osmosis), should impress the socks off passers-by.

http://www.eventhelix.com/RealtimeMantra/Networking/SMTP_Sequence_Diagram.pdf

Really hope this is helpful and not the oppisit of what you wanted.

sunny in Cork?
L
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redgunCommented:
Already explained but here is my 2 cents comment.

when you send a mail from your computer (lets say with OutlookExchange) to your mail server you ask to connect to port 25 this is smtp port.
when your want to retrieve a mail from your server to your computer you ask to the server for port 110 this is pop3 port.
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mark_dhCommented:
All networked machines use ports to communicate with each other. Ports are the way data is transferred between two machines, generally each port has a unique purpose, for example data sent over port 25 (ie mail) is generally not sent via port 21 (which is a way of transferring files - FTP)

Now port 25, allows you to send e-mail out from your local machine to the server. Servers in turn always use port 25 to send mail between each other. When you download mail to your e-mail program, (Outlook, Outlook express, Eudora, MacMail etc. etc.)

So this is how to works

Mail from your computer to Server (25)
Mail from your server to your recipients server (25)
Mail from their server to their computer (110)

So in very simple terms the two ports are used to transfer email between machines.
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ANGELA11Author Commented:
Thank you all for your help - you have all provided me with exactly what i needed !!!!

Cloudy in Cork but its friday !!!!

Once again i appreciate all your help !!

Angela
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Lee W, MVPTechnology and Business Process AdvisorCommented:
If we all provided help, why no split of the points?
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ANGELA11Author Commented:
How can i do that as it really makes sense to do this its only fair
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