Undelivered Mail Returned to Sender

Hi, I have configured the routing and sending SMTP as suggested here: here
From my web submissions, I am getting these messages:

This is the mail system at host [relay.mailchannels.net](http://relay.mailchannels.net/).

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<[[email protected]](mailto:[email protected])>: host [gmail-smtp-in.l.google.com](http://gmail-smtp-in.l.google.com/)[]
said: 550-5.7.26 This message does not pass authentication checks (SPF and
DKIM both 550-5.7.26 do not pass). SPF check for [[artes-saludables.com](http://artes-saludables.com/)]
does not pass 550-5.7.26 with ip: [].To best protect our users
from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26
https://support.google.com/mail/answer/81126#authentication for more 550
5.7.26 information. t3-20020a056a0021c300b0053e2b615693si4720698pfj.106 -
gsmtp (in reply to end of DATA command)

---------- Forwarded message ----------

A post was merged into an existing topic: Not delivered to the Gmail