ok, and how would i set all of this up, at afraid.org, a free dns provider?
On Tue, Dec 8, 2020 at 2:15 PM Richard <inbound-lists-php@xxxxxxxxxxxxxxxxxxxxx> wrote:
> Date: Tuesday, December 08, 2020 11:35:30 +0100
> From: Rene Veerman <rene.veerman.netherlands@xxxxxxxxx>
>
> i've been at this for a few days now, but keep on getting stuck..
>
> while it may be due to my debugging efforts, i can't even get
> Thunderbird to send email through that postfix server of mine at
> the moment, it delivers the following bounce messages, with a link
> that's completely unhelpful :(
>
> This is the mail system at host smtp.nicer.app.
>
> I'm sorry to have to inform you that your message could not
> be delivered to one or more recipients. It's attached below.
>
> . . .
>
> The mail system
> <rene.veerman.netherlands@xxxxxxxxx>
> <rene.veerman.netherlands@xxxxxxxxx>: host
> gmail-smtp-in.l.google.com[2a00:1450:4013:c03::1b] said:
> 550-5.7.1 [2001:980:ed77:1:d565:64ae:934a:c18d] Our system
> has detected that 550-5.7.1 this message does not meet
> IPv6 sending guidelines regarding PTR 550-5.7.1 records
> and authentication. Please review 550-5.7.1
> https://support.google.com/mail/?p=IPv6AuthError for more
> information 550 5.7.1 . bt17si3147299edb.469 - gsmtp
> (in reply to end of DATA command)
>
Your message is being rejected by google because you don't have a
matching PTR record:
message does not meet IPv6 sending guidelines regarding
PTR 550-5.7.1 records
See the:
Follow recommended IP practices
Verify the sending server PTR record
section of the document they reference for specific details, but you
should follow the guidelines on SPF/DKIM/DMARC in the following
section too:
Make sure your messages are authenticated
In general, and especially when sending to google via IPv6, your mail
configuration (server and dns records) needs to be fully standards
compliant.
