Re: lost connection with while receiving the initial server greeting

2009-11-19 Thread Brian Evans - Postfix List
Paweł Burzyński wrote:
> smtpd_banner = Poczta CBMM PAN 
>   
Wietse answered the question precisely.
Part of the reason may be that you do not follow the SMTP protocol in
this line.
http://www.postfix.org/postconf.5.html#smtpd_banner says it MUST start
with $myhostname.
Also removing ESMTP from that line may limit features in Postfix that
outside clients might think do not exist.

> smtpd_recipient_restrictions = permit_mynetworks,  permit_sasl_authenticated, 
>  reject_unauth_destination, reject_non_fqdn_hostname, 
> reject_non_fqdn_recipient, reject_unauth_pipelining, 
> reject_unknown_recipient_domain, reject_rhsbl_recipient dnsbl.njabl.org,  
>reject_rhsbl_recipient blackholes.mail-abuse.org, 
> reject_rhsbl_recipient relays.mail-abuse.org, reject_rbl_client 
> sbl.spamhaus.org,reject_rbl_client cbl.abuseat.org,reject_rbl_client 
> dul.dnsbl.sorbs.net,reject_rbl_client pbl.spamhaus.org,
> reject_rbl_client blackholes.easynet.nl,reject_rbl_client 
> proxies.blackholes.wirehub.net,reject_rbl_client bl.spamcop.net,
> reject_rhsbl_client blackhole.securitysage.com,reject_rhsbl_sender 
> blackhole.securitysage.com,reject_rhsbl_sender dsn.rfc-ignorant.org
> reject_rbl_client dynamic.rbl.tld,reject_rhsbl_client revdns.rbl.tld,
> reject_rhsbl_helo revdns.rbl.tld,reject_rbl_client sbl-xbl.spamhaus.org,  
>   permit
>   

As a side note, you can merge (sbl|pbl|sbl-xbl).spamhaus.org and
cbl.abuseat.org into zen.spamhaus.org.
One lookup instead of four.



Re: lost connection with while receiving the initial server greeting

2009-11-19 Thread Wietse Venema
Pawe? Burzy?ski:
> (lost connection with orion.put.poznan.pl[150.254.5.4] while receiving the 
> initial server greeting)

The TCP-level three-way handshake was completed, but no SMTP-level
greeting was received within $smtp_helo_timeout seconds (default:
300s).  In other words, an application-layer problem.

This could mean that all SMTP *server* processes are busy.

Wietse