SMTP.com — market share 2026

esp

According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), SMTP.com is the email service provider (ESP) for 1,788 domains — 0.29% of 617,702 SPF-publishing domains. Its strongest TLD is .com (58.3% of its domains). Detection: include: mechanisms in the SPF record.

1,788domains

0.29%of SPF-publishing domains

122distinct TLDs

2026-07-13snapshot (updated daily)

Commonly used together with SMTP.com

What else the same 1,788 domains use — cross-tabulated from the same daily snapshot (2026-07-13).

Type	Service	Domains	Share of SMTP.com users
Mailbox	Microsoft 365	565	31.6%
Mailbox	Google Workspace	515	28.8%
Mailbox	Self-Hosted	166	9.3%
Mailbox	Unknown / Other	87	4.9%
Mailbox	Mimecast	82	4.6%
Mailbox	Proofpoint	37	2.1%
ESP	Amazon SES	221	12.4%
ESP	SendGrid (Twilio)	176	9.8%
ESP	Zendesk	168	9.4%
ESP	Mailchimp	124	6.9%

TLD distribution (top 30 of 122)

com — 1,043 (58.3%)

org — 123 (6.9%)

co.uk — 66 (3.7%)

net — 56 (3.1%)

ca — 39 (2.2%)

dk — 38 (2.1%)

in — 32 (1.8%)

org.uk — 29 (1.6%)

nl — 27 (1.5%)

de — 24 (1.3%)

com.au — 14 (0.8%)

it — 12 (0.7%)

fr — 12 (0.7%)

ru — 12 (0.7%)

co.in — 11 (0.6%)

com.br — 10 (0.6%)

co.za — 10 (0.6%)

eu — 10 (0.6%)

edu — 9 (0.5%)

es — 8 (0.4%)

io — 8 (0.4%)

gr — 7 (0.4%)

co — 7 (0.4%)

is — 7 (0.4%)

ch — 6 (0.3%)

mx — 6 (0.3%)

au — 6 (0.3%)

fi — 5 (0.3%)

vn — 5 (0.3%)

be — 5 (0.3%)

Frequently asked questions

How many domains use SMTP.com?

1,788 domains in the Tranco top-1M use SMTP.com as their email service provider (ESP) as of July 13, 2026, according to Live Direct Marketing's daily DNS scan.

What is SMTP.com's market share?

SMTP.com holds 0.29% 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 SMTP.com?

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).

Largest email service provider (ESP)s in this category

Amazon SES (6.21%) · SendGrid (Twilio) (4.76%) · Mailgun (4.11%) · Zendesk (3.86%) · Mailchimp (3.69%) · Mandrill (3.36%) · HubSpot (3.18%) · Salesforce (2.62%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.80%)

ESP / mailing services portfolio → · Full daily report →

Sending through SMTP.com? Check whether your messages actually reach the inbox at Gmail, Outlook, Yandex and Mail.ru — free inbox placement test.

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Domain sample (top 100 by Tranco rank)

hp.com globalsign.com faphouse.com haberler.com imagefap.com sondakika.com jamanetwork.com moz.com getgrass.io sleepfoundation.org greenoracloud.eu intersport.fr mandmdirect.com humblebundle.com use.ai iberia.com captioncall.com bloomsbury.com mitchell1.com ibps.inaustlii.edu.aunzbgeek.infoclips4sale.com000webhost.compixfuture.comolimpbet.kzsnapon.comcargo.sitesnapp.ircroma.comellenmacarthurfoundation.orgdailyherald.cominvoicecloud.comagu.orgsupabets.co.zafundable.comgold.ac.ukhalopsa.comwho.isanimeape.commovistar.clwebpronews.comstream.rupoemhunter.comsite.prohealthit.govplay-cricket.comcampusshoes.comicmarkets.comextremereach.comgear4music.comcreditcards.comchoice.com.ausangfor.comrevenuehunt.comsmtp.comreallifecam.comedsurge.comspectator.orgmydirtyhobby.commyjobhelper.comgodlikeproductions.comstorylineonline.netsorenson.comdesired.dewomenshistory.orgskyairline.comstroeermb.dejensonusa.comunleashedsoftware.comfuelly.comyoungminds.org.ukzonedns.vnclaritycheck.comastrotalk.com3.dkaccessacloud.comrvlife.comindusind.comweichert.comartscouncil.org.ukclaro.com.dopartstown.comantoloji.comchudequebec.cainfowest.com7games.betswansonvitamins.comholidaycottages.co.ukaiche.orgunimagdalena.edu.conhanhoa.combigsoccer.combtc-echo.demother.ly10web.iovault.comstudentclearinghouse.orgsutherlandglobal.comgreatbigcanvas.com

Showing 100 of 1,788 domains.