Sending email with google SMTP in .NET

Question

I'm trying to send a couple of emails using google SMTP server. I've been researching how to and have found plenty of articles on stackoverflow and other resources where people successfuly send email - I haven't been able to do so. Here's the code I've been using trying to contact the SMTP server:

var secureString = new SecureString(); foreach (char c in "password") { secureString.AppendChar(c); } var client = new SmtpClient("smtp.gmail.com", 587) { UseDefaultCredentials = false, DeliveryMethod = SmtpDeliveryMethod.Network, Credentials = new NetworkCredential("[email protected]", secureString), EnableSsl = true }; client.Send("[email protected]", "[email protected]", asdf", "asdf");

The exception I'm getting is saying that it's unable to contact the remote server. The innermost exception says:

"An attempt was made to access a socket in a way forbidden by its access permissions 64.233.161.109:587"

Any suggestions on what else to try?

I've tried this on three different network to ensure that this isn't a firewall issue. Using my cell phone as a hotspot I've had the same problen, which should mean that it isn't a company firewall.

Yes, it doesn't work either albeit with a different innerexception message: "No connection could be made because the target machine actively refused it 74.125.205.109:465". I'm not sure if this is "better" and that it's implying that something else is wrong, e.g. my credentials. — Dzermin Cosovic
– Dzermin Cosovic, Commented Feb 26, 2015 at 10:11
take look to my answer. I have the same problem one month ago and it was resolved as i have mentioned — Med.Amine.Touil
– Med.Amine.Touil, Commented Feb 26, 2015 at 10:15

Med.Amine.Touil · Accepted Answer · 2015-02-26 09:55:17Z

1

It is about a configuration on your gmail account to allow access with your @dress and your password from other application. So you have to activate it.

answered Feb 26, 2015 at 9:55

Med.Amine.Touil

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Dzermin Cosovic Over a year ago

What configuration would that be? Allowing POP/IMAP is a suspect but doesn't do anything in my case...

Dzermin Cosovic · Accepted Answer · 2015-02-27 08:54:40Z

I am answering my own question, which might be a specific answer for my machine but could help others in a similar situation.

My issue was my antivirus software, Macfee, which helpfully decided that trying to send email trafic is probably a virus and thus quietly dropped the trafic from my application. I checked pretty much everything else as I thought that an antivirus would never care about ports (typically a firewall feature imo) but I guess some do...

Anyway the issue is resolved and if anyone else has got the same issue and can't explain it, check your anti virus software...

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