how to find out where email is hosted - SERP Analysis

https://www.reddit.com/r/techsupport/comments/gwr2b2/how_to_find_out_where_an_email_address_is_hosted/

https://www.misk.com/kb/find-email-provider

https://serverfault.com/questions/178040/how-to-find-out-where-email-is-being-hosted-for-a-website

https://support.squarespace.com/hc/en-us/articles/360000203368-Finding-your-email-provider

https://superuser.com/questions/329701/how-to-find-out-domains-email-provider

https://cloud.google.com/identity/docs/identify-host

https://www.tonyherman.com/how-to-figure-out-where-email-is-hosted/

https://support.google.com/mail/thread/109750652/i-can-t-tell-if-my-custom-domain-email-is-hosted-with-google-or-enom-how-do-i-figure-that-out?hl=en

https://help.useresponse.com/knowledge-base/article/how-to-check-email-provider-and-dns-provider

https://www.quora.com/How-can-I-find-out-what-email-provider-a-company-uses