PHP and STMP

HI all

First I must say that I am not sure how PHP and STMP work together so bear with me.

I want to check whether an email address exists or not using PHP? and to get information about the owner of the email address?

I have read the following:

Let us say I have an email address myname@mydomain.com

Firstly within PHP you can validate an email by using filter_var like so:


Secondly you would want to check if the domain runs a email server, to do this you can check the dns records for MX like so:


I understand the above to some point.

Now this is where I have trouble:

You want to open the port on the domain like so:


You can also check to see if the SMTP Server responds with a 550, i.e email does not exist, like so:


Looking at the above you can send commands to a valid smtp server such as helo > mail from <...> and check the 550 response.

My question is how do I put this all together with PHP.

Below is a sample I have seen using some online web tools.


I am hoping to get a PHP script that will do something similar to the above.

Thanks

first of all,

what are you trying to do?

checking unsecured smtp server?

thanks

Thanks for your reply weldan

I simply want to talk to the mailserver.

I know this can be done using Telnet.

I want to do it with PHP

I sent you private message. it might help. tq

Hi Weldan

I got your message and it did help me out.

Now I got a funny situation.

I use the smtp RCPT TO command to send a valid email address.
The mail server comes back with 250 OK

I then send an invalid email and the server still says 250 OK

I read if the email is invalid that I should have got Unkown.

I went to one of those on-line tools that does testing similar to what I did.
When I put in the same invalid email address it actually came back with Unknown.

I read that RCPT TO is supposed to be able to determine if an email address is valid or not.

I tried using the VRFY (verify) command, but the server tells me it cannot verify and that I should us Finger, whatever that is.

I read that VRFY can sometimes be turned off, but how did the online tool do it.

Would you have any ideas?

Thanks