Hi Bryon,
First of all thanks for replying.
The point is the following. I have my prestashop store and suddenly i realize that my customers are not recieving emails. First, i believed it was a problem with prestashop, but then i tried logging into my webmail account via CPanel in order to send mails with my email server account. It's weird but all the mails i've sent to hotmail accounts and gmail accounts never arrived.
I don't know what's the problem. It used to work perfectly. Let me know if you need any further details.
Many thanks in advance.