I have foud 'User activation' email in my spam folder.
A part of email headers:
Received-SPF: none (mx11.o2.pl: domain of email@example.com does not designate permitted sender hosts)Received: from localhost ([127.0.0.1] helo=localhost.localdomain)
And a rating from the Anti-Spam Engine:
X-O2-Trust: 3, 82X-O2-SPF: none
This is probably a misconfiguration in my email server, thanks for letting me know
Moving to uncategorized.