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Preventing gmail to mark our mails as spam

, 29 Feb 2012
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Rencently I've discovered the reason why all the mail messages sent by my Web app were putted on spam folder when the "to" header ends with "@gmail.com".
 
You must include "Message-Id" header or your message will be treated as spam by Google.
 
This is the easy way to do this with System.Net.Mail.MailMessage Class:
Message.Headers.Add("Message-Id", String.Concat("<", Now.ToString("yyMMdd"), ".", Now.ToString("HHmmss"), "@yourdomain.com>" ))
 
And that's all (obviusly you must follow the Google recommendations too).
 
Wish to save at least the same time that I spent resolving this to many of you.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Santiago Santos Cortizo
Software Developer (Senior) Agildata Sistemas
Spain Spain
Software developer since 1985

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QuestionReply PinmemberMember 306572917-Feb-14 6:07 

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