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i am new in this Forum..

Today our Mailserver recieved no emails and when i sent an Email from an other Privider i recive this Message:

This is the mail system at host

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<admin<_at_>>: host[] said: 550 5.7.0 Your
server IP address is in the protect database, bye (in reply to RCPT TO

what is this...? please help!!


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you sent an email from eg. gmail to your connect server and this was the reply? However this message is from Netcologne, maybe it helps to follow the instruction you can see in the error message. Also take a google search for 550 5.7.0.

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i find it out!
The Mailrelay from Netcologne is blacklistet!
thank fo rHelp

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