Mailbox Provider: att.com [ back to main ] Here's MX record breakdown data for att.com. Did you know? Domain att.com hosts mail for 22 of the top ten million domains. Here are the top 5000 domains hosted by att.com: Rank Domain MX Record MX Domain 1 energystar.gov grid1f.gseg.att.com att.com 2 nowness.com grid1i.seg.att.com att.com 3 max.gov grid1f.gseg.att.com att.com 4 jimsformalwear.com mail.global.mas.att.com att.com 5 yourdiscountrx.com grid1i.seg.att.com att.com 6 sustainability.gov grid126.gseg.att.com att.com 7 omb.gov grid1f.gseg.att.com att.com 8 nexans.no mail.global.mas.att.com att.com 9 blueridgebank.com grid1i.seg.att.com att.com 10 journeysawards.com grid1i.seg.att.com att.com 11 maillefer.com grid1i.seg.att.com att.com 12 dentsply.com.br grid1i.seg.att.com att.com 13 universalcard.com almsi1.att.com att.com 14 outlooksoft.com mail.global.mas.att.com att.com 15 degudent.de grid1i.seg.att.com att.com 16 quintolubric.com mail.global.mas.att.com att.com 17 mastercraftcabinets.com grid1i.seg.att.com att.com 18 optekinc.com grid1i-emea.seg.att.com att.com 19 hesfa.com grid1i.seg.att.com att.com 20 louisvuittonkusama.com grid1i.seg.att.com att.com 21 virtualsystemsmanagement.com mail.global.mas.att.com att.com 22 sandraschicken.com grid1i.seg.att.com att.com This ranking is relative inside of top 10 million results. Find more information about the "top domains" data from host.io. DNS Snapshot date: June 2025 Page generated at: Fri Aug 1 09:14:38 CDT 2025