Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rbt.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 16:54:24 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-2.mimecast.com: 10
- us-smtp-inbound-1.mimecast.com: 10
A / AAAA Records
- 104.18.36.94 (no PTR)
- 172.64.151.162 (no PTR)
- 2a06:98c1:3103::ac40:97a2 (no PTR)
- 2a06:98c1:3103::6812:245e (no PTR)
Mail Server IPs
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
ns1.jh-cf.com dns.cloudflare.com 2396771457 10000 2400 604800 1800
Primary NS (mname)
ns1.jh-cf.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396771457
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
ns1.jh-cf.com
ns2.jh-cf.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:mailgun.org ip4:24.248.252.32/27 ip4:207.140.153.32/27 include:spf.zixsmbhosted.com include:us._netblocks.mimecast.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- 0ed1fe018a18e91f98e14244afb32c83
- amazonses:X6lfAnJSTa5sj3IKN0/CSPhArby9EylNHpzyxpxDyiw=
- cplkj9sl920yw4frgtrhdfgrhgtpbnbk
- SPFv=spf1 include:mailgun.org ip4:24.248.252.32/27 ip4:207.140.153.32/27 include:spf.zixsmbhosted.com include:us._netblocks.mimecast.com ~all
- x8w13knw1qs413483cy81nl94z79yyrp
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