
 Manuel Lemos - 2014-08-14 07:55:56 - 
In reply to message 1 from Fady GERGESThat may happen if your hosting company is blocking outgoing connections to port 25. In that case, you cannot do anything if you are on a shared server. It may be possible to avoid that problem using a VPS account or moving to another hosting company.
Anyway, the port 25 connection is necessary to emulate an attempt to a SMTP delivery. It is not necessary to perform that step to make part of the types of the email validation that the class performs though.