how to check if a domain using which mail service - SERP Analysis

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https://www.reddit.com/r/dns/comments/1cyrfup/how_to_know_if_a_domain_is_used_for_email/

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

https://www.quora.com/Is-it-possible-to-find-which-email-service-is-a-given-company-domain-using

https://dnschecker.org/mx-lookup.php

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

https://cable.ayra.ch/mail/

https://mxtoolbox.com/emailhealth

https://support.google.com/a/answer/48323?hl=en

https://www.mailerlite.com/help/how-to-verify-and-authenticate-your-domain

https://serverfault.com/questions/987506/how-can-i-check-if-a-domains-mail-server-is-hosted-by-me

https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/manage-accepted-domains/manage-accepted-domains

https://superuser.com/questions/207516/is-it-possible-to-know-if-a-domain-is-using-google-apps-for-email

https://mailchimp.com/help/verify-a-domain/

https://www.courier.com/guides/email-ip-domain-reputation-check-tools

https://dnschecker.org/domain-health-checker.php

https://answers.microsoft.com/en-us/outlook_com/forum/all/how-does-outlook-know-which-mail-service-provider/49b84088-bee2-40ba-8684-d9bcc05b0809

https://easydmarc.com/tools/spf-lookup

https://wpmailsmtp.com/how-to-verify-your-domain-reputation-for-email-sending/

https://serverfault.com/questions/155073/how-to-determine-if-my-mail-server-is-configured-correctly

https://www.icdsoft.com/en/kb/view/1632_pointing_the_mail_service_to_another_mail_server

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https://support.google.com/a/answer/9122284?hl=en

https://emailverification.whoisxmlapi.com/blog/how-to-check-if-an-email-address-exists-using-dns-mx-records-smtp-connections-email-sending-emulation

https://dmarcreport.com/blog/how-to-check-if-your-email-authentication-is-set-up-correctly-for-dkim-dmarc-spf-bimi/

https://kb.synology.com/en-au/DSM/tutorial/How_to_check_DNS_records_for_MailPlus_Server

https://glockapps.com/blog/email-domain-check-list/

https://proton.me/support/custom-domain

https://www.namecheap.com/support/knowledgebase/article.aspx/322/2237/how-can-i-set-up-mx-records-required-for-mail-service/

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https://easydmarc.com/tools/domain-scanner

https://postmarkapp.com/blog/how-to-check-your-domain-reputation

https://www.mail.com/mail/domains/

https://superuser.com/questions/1708173/why-is-there-a-website-needed-when-having-a-mail-only-domain

https://www.youtube.com/watch?v=xdGG-9aKq74

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https://www.sysnet.ucsd.edu/~voelker/pubs/mx-imc21.pdf

https://www.zoho.com/mail/help/adminconsole/domain-verification.html

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https://yespo.io/blog/how-check-if-your-domain-spam-blacklists

https://www.mailersend.com/blog/dns-records

https://support.plesk.com/hc/en-us/articles/12377674810391-How-to-activate-or-deactivate-the-mail-service-for-a-domain-or-the-entire-Plesk-server

https://support.apple.com/en-mk/guide/apple-business-connect/abcb22cbade5/web

http://faq.dnsexit.com/index.php?action=artikel&cat=2&id=49&artlang=en

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https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0057778

https://www.valimail.com/blog/domain-reputation/

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https://folderly.com/blog/domain-health-check

https://mailtrap.io/free-domain-blacklist-checker/

https://mailchimp.com/help/set-up-email-domain-authentication/

https://www.theseventhsense.com/blog/email-domain-reputation-are-your-emails-going-directly-to-spam

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https://www.whatsmydns.net/

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https://hunter.io/domain-search

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https://www.uspis.gov/news/scam-article/fake-usps-emails

https://knowledge.hubspot.com/marketing-email/manage-email-authentication-in-hubspot

https://support.atlassian.com/user-management/docs/verify-a-domain-to-manage-accounts/

https://www.dell.com/support/kbdoc/en-us/000217008/data-domain-troubleshooting-mailserver-guide

https://serversmtp.com/custom-tracking-domain-what-it-is-and-why-you-should-use-it/

https://www.rejoiner.com/resources/domain-reputation

https://help.webex.com/en-us/article/cd6d84/Manage-your-domains

https://www.hostinger.com/tutorials/how-to-set-up-gmail-for-your-own-domain

https://titan.email/

https://help.salesforce.com/s/articleView?id=mktg.mcae_email_add_domain.htm&language=en_US&type=5