ProtonMail (sender)

mailbox 🇨🇭 CH

ProtonMail outbound.

1,696SPF-authorising domains

0.272%of all SPF domains in Tranco top-1M

189distinct TLDs

2026-04-28snapshot date

TLD Distribution (top 30 of 189)

com — 767 (45.2%)

net — 126 (7.4%)

org — 122 (7.2%)

io — 73 (4.3%)

de — 25 (1.5%)

fr — 22 (1.3%)

eu — 20 (1.2%)

cc — 18 (1.1%)

nl — 17 (1.0%)

co — 17 (1.0%)

dev — 17 (1.0%)

me — 17 (1.0%)

tv — 17 (1.0%)

gg — 15 (0.9%)

app — 14 (0.8%)

to — 14 (0.8%)

co.uk — 13 (0.8%)

ai — 12 (0.7%)

is — 10 (0.6%)

ch — 10 (0.6%)

xyz — 8 (0.5%)

info — 7 (0.4%)

social — 7 (0.4%)

se — 7 (0.4%)

pl — 6 (0.4%)

com.br — 6 (0.4%)

finance — 6 (0.4%)

tech — 6 (0.4%)

fi — 6 (0.4%)

news — 6 (0.4%)

Showing 100 of 1,696 domains. Sample sorted by length (shortest first).