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Help article

Why is my e-mail being returned with the message 'Client host rejected: cannot find your hostname'?

This error means that a computer has attempted to deliver e-mail without a correct reverse DNS.

Due to the large quantity of spam messages, it has regrettably proven necessary to refuse invalidly configured e-mails mail servers.

Your system manager can rectify this by setting a correct reverse DNS for your e-mail server. If you do not know what this means, please send him or her the error message. This error message contains the address of the invalidly configured mail server.

A detailed description about setting your reverse DNS can be found here

Alternately, you can send the e-mail via your access provider’s SMTP-server. This usually is the or

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