Microsoft Defender for Office 365 — market share 2026
← Email Stats home
esp
According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Microsoft Defender for Office 365 is the email service provider (ESP) for 161 domains — 0.03% of 617,702 SPF-publishing domains. Its strongest TLD is .com (46.0% of its domains). Detection: include: mechanisms in the SPF record.
161domains
0.03%of SPF-publishing domains
42distinct TLDs
2026-07-13snapshot (updated daily)
Commonly used together with Microsoft Defender for Office 365
What else the same 161 domains use —
cross-tabulated from the same daily snapshot (2026-07-13).
TLD distribution (top 30 of 42)
com — 74 (46.0%)
co.uk — 12 (7.5%)
org — 12 (7.5%)
net — 5 (3.1%)
de — 4 (2.5%)
fr — 3 (1.9%)
com.br — 3 (1.9%)
nl — 3 (1.9%)
com.ar — 3 (1.9%)
pl — 3 (1.9%)
edu — 2 (1.2%)
pt — 2 (1.2%)
hu — 2 (1.2%)
lv — 2 (1.2%)
ru — 2 (1.2%)
be — 2 (1.2%)
co.il — 2 (1.2%)
my — 1 (0.6%)
lk — 1 (0.6%)
ch — 1 (0.6%)
solutions — 1 (0.6%)
app — 1 (0.6%)
it — 1 (0.6%)
se — 1 (0.6%)
info — 1 (0.6%)
com.au — 1 (0.6%)
co — 1 (0.6%)
co.jp — 1 (0.6%)
com.mx — 1 (0.6%)
at — 1 (0.6%)
Frequently asked questions
How many domains use Microsoft Defender for Office 365?
161 domains in the Tranco top-1M use Microsoft Defender for Office 365 as their email service provider (ESP) as of July 13, 2026, according to Live Direct Marketing's daily DNS scan.
What is Microsoft Defender for Office 365's market share?
Microsoft Defender for Office 365 holds 0.03% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-07-13). The number is recomputed every day.
What are the biggest alternatives to Microsoft Defender for Office 365?
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mailchimp (as of 2026-07-13).
Sending through Microsoft Defender for Office 365? Check whether your
messages actually reach the inbox at Gmail, Outlook, Yandex and Mail.ru — free
inbox placement test.
Test your deliverability →
Domain sample (top 100 by Tranco rank)
sebrae.com.brsportsmans.comsantander.com.mxdaznservices.comintercity.plsantander.com.arargenta.bedvfu.rupernod-ricard.comcentury21.frwbmason.comremita.netjoyfull.co.jpgalls.comjamesonwhiskey.comabsolut.comhooters.comcardiffmet.ac.uksilverstone.co.ukdssl.rujalousiescout.dehornady.commarathonpetroleum.comkenes.comcoffeebean.comcarris.ptyesglasses.comefi.intinstytutpolski.pldigital-science.comsantanderrio.com.archivas.comst-aug.eduaio.lvasmr.communzinger.deuspatriottactical.comcustommarketinsights.comcompuware.comelusivedisc.comwebsas.hueden.acmurrayscheese.comultatel.comcreditfresh.comabsolutdrinks.comosmworldwide.commk.gov.lvtransmedics.comtimeoutmarket.comcarnavalsland.nlrpbusa.orgeventideaudio.comsingledigits.comacp.pt1-stop.bizalta.comselleitalia.combhhc.comeqtiming.comgrahamandgreen.co.uktrumid.compc.co.ilpbsnc.orginfrontoftheline.netflatironschool.comfgbradleys.combusinessmap.ioweavix.comtangoe.comroadsafetraffic.comwestgold.com.aust.gov.myfransbonhomme.frtraknprotect.comairrosti.commetrobus.co.ukuniversal-investment.comhfecorp.comasgct.orgmumm.comlibertybank.gecdrfg.comperrier-jouet.commorebus.co.ukemebehosting.commlltelecom.comergon.netpowertodecide.orgmothor.dedunnlumber.comjucy.comargenta.nlunctv.orgherofx.cocarmats4u.comtooveys.comislandbuses.infovansterpartiet.sebluestarbus.co.uk
Showing 100 of 161 domains.