IONOS / 1&1 (sender)

mailbox 🇩🇪 DE

1&1 IONOS — Europe's largest hosting brand.

1,248SPF-authorising domains

0.2%of all SPF domains in Tranco top-1M

56distinct TLDs

2026-04-28snapshot date

TLD Distribution (top 30 of 56)

com — 516 (41.3%)

de — 384 (30.8%)

co.uk — 66 (5.3%)

fr — 56 (4.5%)

es — 50 (4.0%)

org — 42 (3.4%)

net — 23 (1.8%)

at — 12 (1.0%)

eu — 10 (0.8%)

org.uk — 10 (0.8%)

ca — 8 (0.6%)

it — 6 (0.5%)

io — 6 (0.5%)

ch — 5 (0.4%)

com.mx — 3 (0.2%)

club — 3 (0.2%)

info — 3 (0.2%)

tv — 3 (0.2%)

pk — 2 (0.2%)

nl — 2 (0.2%)

me — 2 (0.2%)

lu — 2 (0.2%)

ai — 1 (0.1%)

plus — 1 (0.1%)

life — 1 (0.1%)

services — 1 (0.1%)

ac — 1 (0.1%)

cc — 1 (0.1%)

sc — 1 (0.1%)

space — 1 (0.1%)

Showing 100 of 1,248 domains. Sample sorted by length (shortest first).