Reverse MX Lookup

Takes a mail server (e.g. mail.google.com) and quickly shows all other domains that use the same mail server. Useful for identifying domains that are used as email aliases

URL

https://api.viewdns.info/reversemx/

Parameters

mx - the mail server to query
output - the output format required ('xml' or 'json')
apikey - your api key
page - view further pages of results (e.g. '2' to view results 10,001 to 20,000) - optional

Sample Query

mx: mail.google.com

GET https://api.viewdns.info/reversemx/?mx=mail.google.com&apikey=yourapikey&output=output_type

XML Response (output=xml)

<?xml version='1.0' encoding='ISO-8859-1'?>
<viewdns>
  <query>
    <tool>reversemx_PRO</tool>
    <mailserver>mail.google.com</mailserver>
  </query>
  <response>
    <domain_count>818</domain_count>
    <total_pages>1</total_pages>
    <current_page>1</current_page>
    <domains>
      <domain>090803.com</domain>
      <domain>1sthealthcare.net</domain>
      <domain>1sthealthsystems.com</domain>
      <domain>2redl.in</domain>
      <domain>44825263.com</domain>
      <domain>65red1.com</domain>
      <domain>800.digital</domain>
      <domain>aboutyoufitness.com</domain>
      <domain>academyhill.org</domain>
      <domain>acbergula.org</domain>
      <domain>accuweight-1014.com</domain>
      ...
    </domains>
  </response>
</viewdns>

JSON Response (output=json)

{
	"query": {
		"tool": "reversemx_PRO",
		"mailserver": "mail.google.com"
	},
	"response": {
		"domain_count": "818",
		"total_pages": "1",
		"current_page": "1",
		"domains": ["090803.com", "1sthealthcare.net", "1sthealthsystems.com", "2redl.in", "44825263.com", "65red1.com", "800.digital", "aboutyoufitness.com", "academyhill.org", "acbergula.org", "accuweight-1014.com", ...	]}
}