Security :: Delivery Of Mails (gmx.de) Failing With System.Net.Mail.SmtpClient

Aug 9, 2010

I'm running a website and to keep my members informed I regularly send mails to our members by the following code :

[Code]....

But the problem is that some mails are not been delivered when I do this by this code.

This is especially not done for gmx.de or gmx.eu mails; but also for other type of mail addresses.

When I send the mail individually I don't have problems.

GMX refers to the following text to avoid SPAM [URL]

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