Does GMail consider itself "low reputation"?

Hi,

In the mail server logs, I found:

2024-07-19 10:39:16 1sUl13-00EJCh-1P ** [email protected] R=outbound
T=remote_smtp H=gmail-smtp-in.l.google.com [2a00:1450:400c:c04::1a]
X=TLS1.3:ECDHE_X25519__ECDSA_SECP256R1_SHA256__AES_256_GCM:256 CV=yes: SMTP
error from remote mail server after end of data: 550-5.7.1
[2a01:4f8:160:83c4::8      19] Gmail has detected that this message
is\n550-5.7.1 likely suspicious due to the very low reputation of the
sending\n550-5.7.1 domain. To best protect our users from spam, the message
has been\n550-5.7.1 blocked. For more information, go to\n550 5.7.1
https://support.google.com/mail/answer/188131
ffacd0b85a97d-368786b3865si463916f8f.529 - gsmtp

This is from sending my prior mail from a GMail account. The "
common-lisp.net" domain has a High (=highest) domain reputation and the IP
reputation is not published, but also not referred to. So I can nothing but
conclude this must be the @gmail.com address that I'm sending from that's
triggering this response?

How can I fight this?!

-- 
Bye,

Erik.

http://efficito.com -- Hosted accounting and ERP.
Robust and Flexible. No vendor lock-in.