Hi,
I have a mailbox hosted at Opalstack. The domain uses Opalstacks nameservers (ns1.de.opalstack.com, etc.) and as per this guide I think I don't need to set any other DNS records: https://docs.opalstack.com/user-guide/domains/#records-for-your-email
E-mail works well, but when I enable the autoresponder in My Opalstack the mails are blocked by Google:
XXX@gmail.com:host gmail-smtp-in.l.google.com[142.250.145.27] said:
550-5.7.26 This mail has been blocked because the sender is
unauthenticated. 550-5.7.26 Gmail requires all senders to authenticate with
either SPF or DKIM. 550-5.7.26 550-5.7.26 Authentication results:
550-5.7.26 DKIM = did not pass 550-5.7.26 SPF [XXX.XX] with ip:
[78.159.112.195] = did not pass 550-5.7.26 550-5.7.26 For instructions on
setting up authentication, go to 550 5.7.26
https://support.google.com/mail/answer/81126#authentication
n13-20020a50934d000000b00554e9024673si6479544eda.626 - gsmtp (in reply to
end of DATA command)
Any ideas here?