Did you install the most recent version of Mercury? Did you read the Mercury help and/or manual on how to set up the system (especially local domains)? Do please not rely on any xampp documentation for this.

/Rolf

Hello, I am currently learning PHP and trying to send eMails.

Before I had a SMTP server I got a error: 

Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in C:\xampp\htdocs\index.php on line 16 

so on ##php they say i need a smtp server, and i go get pmail.

Now I still get the error, can someone help me set it up?

Thanks 

so on ##php they say i need a smtp server, and i go get PMail.

You do not need PMail you need Mercury and that comes with XAMPP.  Did you turn it on and configure it via the admin?  The SMTP Server is MercuryS and Mercury Configuration | Mercury core | Domains must also be configured.

i've activated it.

Warning: mail() [function.mail]: SMTP server response: 553 We do not relay non-local mail, sorry. in C:\xampp\htdocs\index.php on line 16

how do i setup mail?

even in configuration i dont know what i need to do 

You need to enter some reasonable data in Core configuration, Local domains. Read the help text carefully. If it isn't the most recent version of Mercury (4.62) you should update.

/Rolf 

i watched a tut of how to set it up but it still doesnt work

i did all the stuff in config then setup a smtp in thunderbird

..still not working..