How to authenticate SPF or DKIM on an apple/icloud custom email domain?
Hi there, I recently started using an apple/icloud custom email domain. I followed the setup guidance for the custom email domain and everything works well with it, except that I am unable to send out emails to Gmail accounts (it seems that I can receive emails from Gmail accounts, but I cannot respond to them or send an email to them). When I try to do so, I receive an email from the "Mail Delivery System" with the subject line "Undelivered Mail Returned to Server" which reads as follows:
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
[**name of custom email address**] did not 550-5.7.26 pass with ip: [17.58.63.176]. 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.
a7-20020a05622a064700b0040ebf8e5d49si5515178qtb.458 - gsmtp (in reply to
end of DATA command)
I have followed the link provided in this message, but it doesn't provide much assistance and just advises that anybody who needs to authenticate with SPF or DKIM contact their email service provider.
Does anybody know how it is possible to authenticate SPF and/or DKIM on an apple/icloud custom email domain?
Many thanks :)
