Some times when i send an email, i receive this error message:
Delivery to the following recipient failed permanently:
(Their email address)
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain (Their website address) by (Their website address) . [188.8.131.52].
The error that the other server returned was:
550 SPF: 184.108.40.206 is not allowed to send mail from (my email address)
I need this fixed as soon as possible.