Authenticated gmail

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Ádám Suller

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Feb 22, 2022, 5:55:55 AM2/22/22
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Hello, I want to ask for help with:

I am working on creating a newsletter service. If I have a gmail address on my website to send the newsletter, I would like my own server to authenticated gmail email.

If the address is not authenticated, the message will arrive as follows: Gmail was unable to verify that the message was actually sent from X...@gmail.com.

For other providers, this is shown as follows:
XYZ - x...@gmail.com via s10.mailxmasterplus.net
From: s9.mailxmasterplus.net Authenticator: s10.mailxmasterplus.net

How and what do I need to include in my service to have mail authenticated by my own server?
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