Email Sent via Gmail SMTP using C# Being Treated as Spam by yahoo

suvam8694 asked:

i have designed an application for sending mails via a gmail account.
i am using the gmail smtp server at port 587 and it works well. at port 25 too it works well. but the email sent like this are being treated as spam by yahoo.
yes it is for sending bulk mails but the same problem persists event if it is sent to just one recipient.
further if i use port 465 the error appears "Connection timed out"

I tried experimenting by using TcpCient to do the same thing. with port 465 the same error exists after successful login and once the request to deliver message is sent. on ports 587 and 25 while using

sslStream.AuthenticateAsClient("smtp.gmail.com")

i get the message "handshake failed due to unexpected packet format"

What to do?
Basically i want that my mails should not be treated as spam.

It would be really more helpful if you could plz give reasons as to why the things happened as mentioned above.

Thanks in advance.

Tags: C#, ASP.NET

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

Cancel

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

Please note that all posts will be submitted under the http://www.codeproject.com/info/cpol10.aspx.