Hi, I've tested my application in my network (that have no Firewall) and my application sended e-mails normally. But when I installed the same application on my client and I tried to send an e-mail, this message appeared:
Is the Firewall blocking my application? If it's the firewall, how can I send a mail under a Firewall? Thanks.
I have no idea why your mail program is generating that error, however, I would advise you or a Bartender to edit your Post and take out the IP addresses you have posted. That just seems like a hackers dream to have that kind of information.