I was trying to learn the PHP mail function and for that i configured Mercurymail in xampp.It was working fine for some time..But after an hr or so my mail client Thunderbird showed an error "could not connect to localhost:connection refused"..
But again after some time it started working fine...
Is there any problem with ports....
POP:110(Incoming) SMTP:25(outgoiong)
or any firewell issue?