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* In order to reduce SPAM, all email addresses will be obfuscated so they cannot be read by spam bots.
For example: 'test@test.com' will become 'test (at) test dot com'.

[COMException (0x8004020f): The server rejected one or more recipient addresses."]
This is happening because your SmtpMail.SmtpServer is rejecting addresses.

  • Make sure all email addresses specified at MailMessage.To, MailMessage.Cc, MailMessage.Bcc and MailMessage.From are valid email addresses.
  • Make sure you have permissions to relay through the server.
  • Make sure the MailMessage.From has permissions to relay through the server.