SparkPost

esp 🇺🇸 US

MessageBird-owned high-volume transactional email backbone.

2,733SPF-authorising domains

0.439%of all SPF domains in Tranco top-1M

153distinct TLDs

2026-04-28snapshot date

Historical Share

com — 1,303 (47.7%)

cz — 232 (8.5%)

org — 193 (7.1%)

net — 66 (2.4%)

co.uk — 64 (2.3%)

nl — 63 (2.3%)

sk — 59 (2.2%)

ro — 46 (1.7%)

de — 45 (1.6%)

it — 35 (1.3%)

io — 33 (1.2%)

be — 32 (1.2%)

com.br — 30 (1.1%)

fr — 24 (0.9%)

com.au — 24 (0.9%)

ca — 23 (0.8%)

eu — 23 (0.8%)

pl — 23 (0.8%)

es — 19 (0.7%)

hu — 16 (0.6%)

ru — 15 (0.5%)

ch — 12 (0.4%)

pt — 12 (0.4%)

edu — 12 (0.4%)

gr — 11 (0.4%)

co — 11 (0.4%)

org.uk — 9 (0.3%)

at — 9 (0.3%)

fi — 9 (0.3%)

no — 8 (0.3%)

Showing 100 of 2,733 domains. Sample sorted by length (shortest first).