How to fix Gmail: 550-Please turn on SMTP Authentication in your mail client
If you encounter:
The error that the other server returned was: 550-Please turn on SMTP Authentication in your mail client, or login to the 550-IMAP/POP3 server before sending your message.
You may need to add
include:_spf.google.com
to your SPF record.
The error that the other server returned was: 550-Please turn on SMTP Authentication in your mail client, or login to the 550-IMAP/POP3 server before sending your message.
You may need to add
include:_spf.google.com
to your SPF record.
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