Hi All:
What works:1) incoming e-mail using ubuntu server postfix works.
2) outgoing e-mail using ubuntu server postfix when sent to yahoo.com
What is broken:1) outgoing e-mail from my personal use ubuntu server postfix here at home when sent to twc.com and other places that use Spamhaus.
Postfix fails sending e-mail to twc.com (Time Warner Cable) and some other places.
Problem sending e-mail to various domains such as my seldom used e-mail address at twc.com(and other places too), here is the problem report text in the e-mail sent to me from my local postfix:
Code:
<[my-email-id]@twc.com>: delivery temporarily suspended: host
pkvw-mx.msg.pkvw.co.charter.net[47.43.26.7] refused to talk to me: 554
p-impin020.msg.pkvw.co.charter.net cmsmtp Connection Rejected - see
http://www.spamhaus.org/query/ip/74.13x.xx.xxx (I obscured it because it was my home IP number) AUP#In-1240
Apparently Spamhaus does't like the IP here at home that postfix is sending from and twc.com refuses the e-mail because of that. I am guessing that is what the message means.
Interesting is that e-mail to yahoo.com is received at Yahoo, I read it and it works ok!!! but not to twc.com??? and because it sends to yahoo.com I guess postfix is set up correctly for sending e-mail.
Does anybody have any suggestions how I can fix this issue on this my personal server here at home? This internet comes in over cable TV coax (Spectrum home use which was Time Warner in the recent past now owned by Charter)
Thanks All - Mike
Stuff:
ubuntu server 20.04
on an old HP 8730w core2duo
on a flash thumb-drive (Sandisk)
through an ON NETWORKS N300 router (using DMZ on server 192...IP)
to an old ancient Motorola Surfboard modem
to Spectrum via home cable tv coax (was Time Warner)
to ...the cloud
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