Hi all

I have using several email addresses for several years now but over the past few months my mails are being bounced. My email address is noted as authenticated but my message is described as unsafe.

For goodness sake, I am just arranging the details of an appointment.  Google Meeting request never gets through any more. and that from a gmail address to a gmail address. Strangely, the email works from this server. The error message at the end of the link feels like it is intended to be decyphered by a sys adminand not a common user (like me)


Sending of the message failed.
An error occurred while sending mail. The mail server responded: Authentication Required. Learn more at https://support.google.com/mail/?p=WantAuthError d7-20020a170902cec700b001a52974700dsm5743554plg.174 - gsmtp. Please verify that your email address is correct in your account settings and try again.

And another version:

This message was created automatically by mail delivery software.

Sorry, the message you're trying to send cannot be delivered to one or more 
recipients.
The address may be invalid or mistyped. Please view the error below:

<[email protected]>: 550 This mail is unauthenticated, which poses a 
security risk to the


Reporting-MTA: dns; mail-1k-r77.ipv4.per01.ds.network
Received-from-MTA: dns; cp-wc92.per01.ds.network (185.184.155.89)
Arrival-Date: Sun, 28 May 2023 13:36:32 +0800
X-Original-ID: 9a76e031-fd19-11ed-9f34-d094665788dc

Final-Recipient: rfc822;[email protected]
Action: failed
Status: 5.7.26
Remote-MTA: dns; gmail-smtp-in.l.google.com (142.251.12.27)
Diagnostic-Code: smtp; 550 5.7.26 This mail is unauthenticated, which poses a
 security risk to the sender and Gmail users, and has been blocked. The sender
 must authenticate with at least one of SPF or DKIM. For this message, DKIM
 checks did not pass and SPF check for [algphoto.com.au] did not pass with ip:
 [27.111.89.56]. The sender should visit
 https://support.google.com/mail/answer/81126#authentication  for instructions
 on setting up authentication.
 z13-20020aa79f8d000000b0063f1582c50bsi7743488pfr.338 - gsmtp (in reply to EOD
 command)


 There is more but it may reveal too much for the intended receiver.
Let me know how much you need

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