My mail server has just been blacklisted on CBL and I was needing some help with HELO configs.
Basically when using there test email firstname.lastname@example.org I am told my HELO is incorrectly configured.
This is because I am using our ISP's SMTP server to relay so the helo string is
550 HELO for IP 212.74.**.66 was "mc26.lon.server.colt.net"
However when I use DNS to route its fine.
550 HELO for IP 80.169.***.15* was "sc-ex1.mydomain.local">
I would prefer to use their SMTP server as sometimes DNS mail is delayed to certain domains like yahoo.com and aol.com.
I am wondiering if there is away of telling the HELO packet to keep its original form, not take on the ISP's SMTP server, I maye need to contaxct the ISP I know but figured I'd bounce this off some experts.