Hosted Email (Rackspace, sender)

mailbox 🇺🇸 US

Rackspace/Hostedemail shared infra outbound.

1,452SPF-authorising domains

0.233%of all SPF domains in Tranco top-1M

87distinct TLDs

2026-04-28snapshot date

TLD Distribution (top 30 of 87)

com — 923 (63.6%)

net — 105 (7.2%)

co.uk — 42 (2.9%)

org — 37 (2.5%)

shop — 26 (1.8%)

ca — 24 (1.7%)

de — 22 (1.5%)

co — 18 (1.2%)

store — 17 (1.2%)

in — 17 (1.2%)

pl — 16 (1.1%)

it — 15 (1.0%)

fr — 13 (0.9%)

co.jp — 12 (0.8%)

io — 12 (0.8%)

jp — 9 (0.6%)

com.au — 8 (0.6%)

nl — 7 (0.5%)

at — 7 (0.5%)

com.br — 6 (0.4%)

es — 6 (0.4%)

us — 6 (0.4%)

eu — 5 (0.3%)

mx — 5 (0.3%)

co.za — 4 (0.3%)

se — 4 (0.3%)

hu — 4 (0.3%)

org.uk — 3 (0.2%)

ro — 3 (0.2%)

com.mx — 3 (0.2%)

Showing 100 of 1,452 domains. Sample sorted by length (shortest first).