Check PoP3 & SMTP Servers are up

[Ben]

Hi

We have an application that during a process we need to check that a remote
POP3 Server and SMTP Server are accessable.

Ideally we just want to open a connection and close it immediately.

Is this possible without a third party tool?

Any advice is much appreciated.

Thanks
B

 

[Simon Verona]

For both you should be able to create a socket connection on the relevant
port sending a "HELLO" message and see if you get a reply... Any reply
should indicate that the pop3 or smtp server is alive.

Regards
Simon

 

[Crouchie1998]

I agree. Just create a socket & connect it to that address with the given
port (25 for example).

This search will help you for code:

http://www.gotdotnet.com/community/usersamples/Default.aspx?query=pop3&Sites=(www.GotDotNet.com)

If you are looking for an SSL class then there is a free C# library
available with examples in C# & VB.NET:

http://www.mentalis.org/php/dm/dm.qpx?28

If the above link don't work then download it from the following page:

http://www.mentalis.org/soft/projects/seclib/download.qpx

It is what the Google Mail Checker uses

I hope this helps,

Crouchie1998
BA (HONS) MCP MCSE