* Jeetu <[email protected]>:
> Hi,
> 
> Im using postfix 2.8.5 with postscreen.
> Im constantly getting this error message
> 
> Oct 18 08:02:10 inbound-us1 postfix/postscreen[12189]: NOQUEUE:
> reject: RCPT from [x.x.x.x]:64730: 550 5.5.1 Protocol error;
> from=<[email protected]>, to=<[email protected]>,
> proto=SMTP, helo=<greetings.info>
> Oct 18 08:02:14 inbound-us1 postfix/postscreen[12189]: NOQUEUE:
> reject: RCPT from [x.x.x.x]:65127: 550 5.5.1 Protocol error;
> from=<[email protected]>, to=<[email protected]>, proto=SMTP,
> helo=<greetings.info>
> Oct 18 08:02:27 inbound-us1 postfix/postscreen[12189]: NOQUEUE:
> reject: RCPT from [x.x.x.x]:26330: 550 5.5.1 Protocol error;
> from=<[email protected]>, to=<[email protected]>, proto=SMTP,
> helo=<zoomz.info>
> Oct 18 08:02:27 inbound-us1 postfix/postscreen[12189]: NOQUEUE:
> reject: RCPT from [x.x.x.x]:21985: 550 5.5.1 Protocol error;
> from=<[email protected]>, to=<[email protected]>, proto=SMTP,
> helo=<zoomz.info>
> 
> Can someone explain me whats wrong in my postscreen configuration ?

Nothing. The sending client doesn't properly speak SMTP.

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
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  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
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