On 07-07-2021 4:39 pm, Wietse Venema wrote: Please RTFM Postfix documentation. If it does not mention IP addresses then it does not use the IP addres,
I did read the manual which says:"Reject the request when the HELO or EHLO hostname has no DNS A or MX record."
Best to my knowledge "DNS A" means IP so the manual does mention IP addresses, but then it doesn't say anything about if or what it does with that IP so i just wanted to clarify and not assume.
