barracuda.com
outbound-ip77b.ess.barracuda.com
mail.ess.barracuda.com
outbound-ip12a.ess.barracuda.com
outbound-ip12b.ess.barracuda.com
mail.ess.au.barracuda.com
backfeed.barracuda.com
www.barracuda.com
campus.barracuda.com
bsf02.barracuda.com
更多子域名
