[BlueOnyx:25360] Email was not accepted because WHOIS lists recent changes

[Meaulnes Legler @ MailList]

this is really strange and never noticed it until today

I renewed the domain name «domain.tld» at its registrar GoDaddy today. Then I wanted to send an e-mail from «me at domain.tld» to «user at domain.tld» and got the following message from my mail client:

> Sending of the message failed.
> An error occurred while sending mail. The mail server responded:
> Email was not accepted at this time, because the WHOIS of your domain lists recent changes..
> Please check the message recipient "user at domain.tld" and try again.

What the heck? Whois reports the update that occurred today:

> [Querying whois.publicinterestregistry.net]
> [whois.publicinterestregistry.net]
> Domain Name: DOMAIN.TLD
> Registry Domain ID: D1702817-LROR
> Registrar WHOIS Server: whois.godaddy.com
> Registrar URL: http://www.whois.godaddy.com
> Updated Date: 2022-03-18T09:01:23Z	<<--
> Creation Date: 1998-05-07T04:00:00Z
> Registry Expiry Date: 2023-05-06T04:00:00Z
> Registrar Registration Expiration Date:
> Registrar: GoDaddy.com, LLC
> Registrar IANA ID: 146
...etc...

but why does this affect sending mails to that freshly updated domain? Sending an e-mail from another domain, as e.g. gmail, to that same address works, but from and to the same domain doesn't.

/var/log/maillog reports:

> Mar 18 14:05:25 vs milter-geoip[3469741]: WHOIS_BLOCK: Domain of Sender's Email-Address: domain.tld - Registrar: GoDaddy.com, LLC - Update: Fri Mar 18 09:01:20 2022 - TimeDiff: WARN: Reg younger than ONE WEEK!
> Mar 18 14:05:25 vs postfix/smtpd[3827452]: NOQUEUE: milter-reject: RCPT from 238.132.61.188.dynamic.wline.res.cust.swisscom.ch[188.61.132.238]: 541 5.4.1 Email was not accepted at this time, because the WHOIS of your domain lists recent changes.; from=<me at domain.tld> to=<user at domain.tld> proto=ESMTP helo=<[192.168.105.53]> sasl_username=<meaulnes>

this «TimeDiff: WARN: Reg younger than ONE WEEK!» is odd... anyone can explain?

Thank you and best regards

で⊃ Meaulnes Legler
Zurich, Switzerland
+41¦0 44 260-1660