I keep getting this error message when I email from Aquamail to gmail.
"Reason: There was an error while attempting to deliver your message with [Subject: *********** etc MTA p3plwbeout27-05.prod.phx3.secureserver.net received this response from the destination host IP - 142.251.163.26 - 550 , 550-5.7.26 This mail is unauthenticated, which poses a security risk to the
550-5.7.26 sender and Gmail users, and has been blocked. The sender must
550-5.7.26 authenticate with at least one of SPF or DKIM. For this message,
550-5.7.26 DKIM checks did not pass and SPF check for [alanfarthing.com] did
550-5.7.26 not pass with ip: [216.69.139.54]. The sender should visit
550-5.7.26 https://support.google.com/mail/answer/81126#authentication for
550 5.7.26 instructions on setting up authentication. h15-20020a0562140daf00b005e7964e3001si4896896qvh.241 - gsmtp"
Any ideas please
