How does IMail specifically handle the various types of DNS Blacklist queries?
*** Client / MTA Connecting from 192.168.0.11 ***
Query Domain = "blacklist.tld"
### Example SMTP Session ###
HELO/EHLO mx1.example1.com
MAIL FROM: sender@example1.com
RCPT TO: recip@example2.com
DATA
....
.
### End SMTP Session ###
Given the example session above DNS checks will be as follows:
ADDR will result in a query of sender.example1.com.blacklist.tld
If we find an A Record response or a CNAME that then resolves to an A Record the check considers the address on the blacklist and selected actions will be taken.
DNS will result in a query of 11.0.168.192.blacklist.tld
If we find an A Record response or a CNAME that then resolves to an A Record the check considers the address on the blacklist and selected actions will be taken.
RHS will result in a query of example1.blacklist.tld
If we find an A Record response or a CNAME that then resolves to an A Record the check considers the address on the blacklist and selected actions will be taken.
HELO will result in a query of mx1.example1.com.blacklist.tld
If we find an A Record response or a CNAME that then resolves to an A Record the check considers the address on the blacklist and selected actions will be taken.