Messages Blocked
Some of my colleagues are trying to send me email and yahoo is blocking the messages. The response states 550 5.7.9 This mail has been blocked because the sender in unauthenticated. Yahoo requires all senders to authenticate with either SPF or DKIM.
I have been sending and receiving messages from this other emails until now. I can we fix this? Please help.
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Deb Namestka
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Hi there. Please be advised that Yahoo is protecting you by prioritizing authenticated email. The small business or domain that is trying to email you needs to update its DKIM settings/security with its email provider. They can also contact our Postmaster team at https://senders.yahooinc.com/contact/