On 2024-06-19 Jeff Peng via Postfix-users wrote:
> On 2024-06-19 17:29, Matt Kinni via Postfix-users wrote:
>> On 2024-06-19 02:27, Matt Kinni via Postfix-users wrote:
>>> On 2024-06-16 15:21, Cody Millard via Postfix-users wrote:
>>>> smtpd_helo_restrictions =
>>>>     ...
>>>>     reject_non_fqdn_helo_hostname,
>>>>     ...
>>> I've found this to block some legitimate mails in the past
>> Sorry, I meant "reject_unknown_helo_hostname".
>
> what's unknown_helo_hostname? does it mean it has neither A nor mx record?

>From `man 5 postconf`:

| reject_unknown_helo_hostname (with Postfix < 2.3: reject_unknown_hostname)
|     Reject the request when the HELO or EHLO hostname has no DNS A or MX 
record.

Regards
Ansgar Wiechers
-- 
"Abstractions save us time working, but they don't save us time learning."
--Joel Spolsky
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