You came here probably after seeing a mail of yours TO someone@dslr.net being rejected with a message like this:

Greylisted for 300 seconds (see ...)

The mail server generating this error message is using a system called Greylisting to filter spam and viruses. It relies on Mail Servers behaving according to the standards and usually doesn't require any action by the user. Your mails should only possibly be delayed.

Who to contact in case of problems

If you wish to have your domain whitelisted because your mail server does not quite follow mail RFC standards, please post in our site help forum
»Need Site Help
you may post anonymously.

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