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On Sun, Aug 6, 2017 at 4:51 PM, Walter Alejandro Iglesias <> 

> Hello everyone, I was using smtpd(8) (static IP and FQDN resolving direct and 
> reverse) for a year without problems. Today sending from my server (from the 
> same address I'm using now) to gmail and hotmail they answered the following 
> (MAILER-DAEMON answer). Sending to gmail addresses: * 550-5.7.1 
> [] The IP you're using to send mail is not authorized to send 
> email directly to our servers. Please use the SMTP relay at your service 
> provider instead. Learn more at 
> e1si6736354wra.236 - 
> gsmtp Sending to hotmail: * 550 DY-001 (SNT004-MC3F42) 
> Unfortunately, messages from weren't sent. Please contact your 
> Internet service provider. You can tell them that Hotmail does not relay 
> dynamically-assigned IP ranges. You can also refer your provider to 
> On the hotmail link 
> above the explanaition for code DY-001 is: Mail rejected by for 
> policy reasons. We generally do not accept email from dynamic IP's as they 
> are not typically used to deliver unauthenticated SMTP email to an Internet 
> mail server. If you are not an email/network admin please contact your 
> Email/Internet Service Provider for help. maintains 
> lists of dynamic and residential IP addresses. It doesn't happen with yahoo. 
> I visited site and found out my IP is included in a list called 
> PBL that, as they explain is not a spammers list, it just includes dynamic 
> and "non mail server IP ranges". Does someone here know what is "non mail 
> server IP ranges" about? Or, how could my static IP could be taken as dynamic 
> (some DNS faliure at my ISP end?).

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