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Outbound IPv6 for domain not working
Problem reported by Hasan Dilmac - August 21, 2016 at 12:19 PM
Submitted
All settings done properly, server can ping via IPv6 outside world, SM can see all IPv6 set in the interface. Settings > Protocols > Smtp out > IPv4 and IPv6 says Use the Domain IP. However the IPv6 set for outgoing domain is not being sent in the msg header. Has anyone got this working? Server will have IPv4, domain IPv6...

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1
Bruce Barnes Replied
August 22, 2016 at 11:06 AM
Are you running a static IPV6 IP address?
 
Did you replicate all of the ports on IPV6?
 
Did you map the new IPV6 ports to the PUBLIC IPV6 IP address - must NOT be a private or natted IPV6 address, but a PUBLIC IPV6 address,
 
Did you add a HOST A RECORD with the IPV6 IP address?
 
Did you add the new IPV6 HOST A RECORD to the domain's MX records?
 
Did you add the IPV6 IP address do DNS, rDNS., SPF, and DMARCIAN
 
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

Web and E-Mail Hosting, E-Mail Security and Consulting
0
Hasan Dilmac Replied
August 23, 2016 at 12:42 PM
Hello Bruce,
 
Thanks for your reply.
 
>Are you running a static IPV6 IP address?
Yes, 
 
>Did you replicate all of the ports on IPV6?
Yes all 6 services enabled at Settings > Bindings > IP Addresses > Respective IPv6
 
>Did you map the new IPV6 ports to the PUBLIC IPV6 IP address - must NOT be a private or natted IPV6 address, but a PUBLIC IPV6 address,
I don't know what you mean by mapping, I know the port configuration done as i mentioned above. I don't have any NAT, nothing special configuration, it's just same as IPv4 settings in Windows. I can ping between two different servers and google public DNS via IPv6
 
> Did you add a HOST A RECORD with the IPV6 IP address?
Yes, AAAA record created
 
> Did you add the new IPV6 HOST A RECORD to the domain's MX records?
I have only A record, mx pointing the server's IPv4.
 
> Did you add the IPV6 IP address do DNS, rDNS., SPF, and DMARCIAN
rDNS ok, did lookup and got result OK.
SPF added in DNS zone settings which is stored in cPanel DNS. It's same as IPv4 with a little difference; "ipv4" replaced with "ipv6" in the txt line in cpanel's DNS zone.
DMARCIAN i don't know this, i will check.
 
Result: Gmail still shows only server's IPv4, regardless I did set "Unassigned" or assign "Server IP" in Domain outbound IP v4 > Technical TAB.
 
1
Bruce Barnes Replied
August 24, 2016 at 10:46 AM
Your OUTBOUND IPV 4 to FULLY QUALIFIED DOMAIN NAME needs to be MAPPED in two places:
 
 
and
 
note that this mapping is to the PUBLIC, STATIC, EXTERNAL IP ADDRESS.
 
You also need to include the #HostName# variable as the FIRST ITEM, in the following three places:
 
SETTINGS, PROTOCAL SETTINGS, POP
 
 
 
SETTINGS, PROTOCAL SETTINGS, IMAP OUT:
 
 
and SETTNGS, PROTOCAL, SMTP IN:
 
 
Make certain you have also mapped the DOMAIN to the proper IP ADDRESS and that you have selected the appropriate settings for:
 
your OUTBOUND IP addresses.  We do not use IPV6, and our domains all use a single IPV4 address

remember to DISABLEDNS CACHING - it can be poisoned too easily, resulting in further non-delivery issues.
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

Web and E-Mail Hosting, E-Mail Security and Consulting

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