Hi Harry,

do those computers 1) send via your server (which is located in one of those 
problematic domains) or shall your server 2) receive mails from those machines?

In case 1) I recommend to make qmail all mails forwarding to the provider's 
regular SMTP server.
In case 2) your users should better use the submission port 587 with 
authentication to send mails.

The problem is in case 1) that even when you whitelist those IP-Addresses, 
other many other recipients will not be able to receive those mail, because 
many providers are using the spamhouse blacklists...

Best regards,
Johannes

Harry Zink schrieb:

So, I've run into the situation of not being able to send (SMTP) from behind certain ISP locales, specifically SprintPCS at spcsdns.net. The same applies to an associate in Thailand behind TRUE DSL. Checking the logs, I came across this, which pretty much shows that these locales are flagged by Spamhaus:

@4000000046cef19224376684 tcpserver: pid 18423 from 70.6.41.192
@4000000046cef192243da814 tcpserver: ok 18423 mbox.fizbin.com:216.193.231.147:587 h460629c0.area1.spcsdns.net:70.6.41.192::50592 @4000000046cef192244b4c44 rblsmtpd: 70.6.41.192 pid 18423: 451 http://www.spamhaus.org/query/bl?ip=70.6.41.192
@4000000046cef19231c1c524 tcpserver: end 18423 status 0
@4000000046cef19231c1ccf4 tcpserver: status: 0/100

So, the question is how can I set up exceptions, or just disable the outgoing check completely - either for specific accounts, or just system wide?

Clearing out, for example, spamhaus from /var/qmail/control/blacklists made no difference to this.

Any help, please?

Harry

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