Email being sent with t-sender-sib.com

I understand the reason for this. I my case I use Brevo to send books from Calibre and Calibre web to my Kindle - I am not a mass mailer. I have added the t-sender-sib.com address to my Amazon approved senders list and still receive the books, but I realise this is temporary. I don’t have a domain to authenticate. Is there any way I can continue to send my books using the old gmail address? Or is there another easy solution for my use case?

Hi @John , thanks for posting on this community!

The old gmail address won’t work, as per the Google and Yahoo requirements.
I’m trying to think about it but I believe you don’t have any other choices than having your own domain, unfortunately.

To give more context about this topic to our readers:

Hey ! I have authenticated my domain but still it is sending from investinmindd@239448610.t-sender-sib.com , what can I do to resolve it ?

Follow up is here about this question: Sender Information: from parameter being @t-sender-sib.com