Sending Mail via ASP.NET

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Dear All,

I recently had posted one query regarding sending of mails using ASP.NET.

I was not getting any error neither was my mail sent.

But suddenly, today in the Spam folder of my sending mail address I found undeliverable mails.

the reason was as below.

"

MSIL

The IP you're using to send mail is not authorized
550-5.7.1 to send email directly to our servers. Please use the SMTP relay at
550-5.7.1 your service provider instead.

"
Now can anybody tell me how to authorize my IP or how can I send mails from my own PC...This is extremely required for my project.

Mu UI is the same as mentioned as an example for sending Mails via ASP.NET in CP.

Kindly assist.

Mukund

Posted 20-Sep-10 9:08am

Mukund Kallapur

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TheyCallMeMrJames · Answer 1 · 2010-09-20T09:14:00

I know this won't be the answer you want, but you'll find that I'm probably bang-on.

You don't have to do anything different from what you previously did. Your code sounds like it works and you aren't getting runtime exceptions.

What's happening is that you are running into anti-spam protection and won't be able to get around it with anything you do on your end. Period.

Besides, if you're trying to send from your local IP you'll endlessly be fighting blacklists. The best bet, if you insist on running it from home, would be to get a domain name and get your ISP to change your reverse DNS entry from the 'dynamic', auto-named class of rDNS to mail.whateveryourdomainis.com so the world knows that it's not just a spam server.

If you're doing something legitimate (like for business) contact your ISP and ask if they have a mail relay that you can get an account for. Mine has such a server and does not have the residential mail send limits on it.

If this is a commercial project (that you will be reselling) make sure you seed in some configuration options (or use the SMTP configuration section in ASP.NET) for your end users.

Cheers.