Whether it is possible to set the possibility of answering the noreply@mydomain.com adress?

I’ve got one MX record set up so far.
inbound-smtp.eu-west-1.amazonaws.com.

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But good. Your advice seems to be interesting. Only now I have a dilemma.

Wanting to use this guide -> Straightforward direct-delivery incoming mail
My question:
Should I also have to set mx records in AWS SES settings (MAIL from domain) or not ??
I mean this: