Rackspace (sender)

mailbox 🇺🇸 US

Rackspace email/cloud outbound (emailsrvr.com).

2,793SPF-authorising domains

0.448%of all SPF domains in Tranco top-1M

144distinct TLDs

2026-04-28snapshot date

TLD Distribution (top 30 of 144)

com — 1,974 (70.7%)

net — 140 (5.0%)

org — 136 (4.9%)

co.uk — 115 (4.1%)

ca — 25 (0.9%)

com.au — 25 (0.9%)

gr — 15 (0.5%)

com.br — 14 (0.5%)

it — 13 (0.5%)

mx — 11 (0.4%)

com.mx — 11 (0.4%)

in — 10 (0.4%)

io — 10 (0.4%)

fr — 9 (0.3%)

us — 9 (0.3%)

co.il — 9 (0.3%)

es — 9 (0.3%)

nl — 8 (0.3%)

co — 8 (0.3%)

de — 8 (0.3%)

ai — 7 (0.3%)

info — 7 (0.3%)

lk — 7 (0.3%)

cl — 7 (0.3%)

pk — 6 (0.2%)

pl — 6 (0.2%)

biz — 6 (0.2%)

ro — 6 (0.2%)

pe — 5 (0.2%)

com.pk — 5 (0.2%)

Showing 100 of 2,793 domains. Sample sorted by length (shortest first).