host gmail-smtp-in.l.google.com [142.251.5.26]
SMTP error from remote mail server after pipelined end of data:
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 [collierstreetgarage.co.u
550-5.7.26 k] did not pass with ip: [185.151.28.66]. The sender should visit
550-5.7.26 Prevent mail to Gmail users from being blocked or sent to spam - Gmail Help for
550 5.7.26 instructions on setting up authentication. m4-20020adff384000000b0030ae32ff757si578822wro.255 - gsmtp
You need to send this to your email provider. They will know what to with it as SPF or DKIM are server configurations.
Once they have fixed it, you will be able to send to Gmail addresses again,
send what i cannot see anything to send sorry
Send them the error you posted above. It has to do with their server, so they will know what to do.
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