Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sco.org
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-20 18:14:42 UTC · ↺ Refresh
MX Hostnames
- usb-smtp-inbound-1.mimecast.com
- usb-smtp-inbound-2.mimecast.com
MX Priorities
- usb-smtp-inbound-1.mimecast.com: 10
- usb-smtp-inbound-2.mimecast.com: 20
A / AAAA Records
- 141.193.213.21 (no PTR)
- 141.193.213.20 (no PTR)
Mail Server IPs
- 170.10.150.242 ↩ usb-smtp-delivery-2.mimecast.com
- 170.10.152.242 ↩ usb-smtp-delivery-2.mimecast.com
SOA Record
Raw SOA
ns10.digicertdns.com dns.digicertdns.com 2009013596 43200 3600 1209600 180
Primary NS (mname)
ns10.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009013596
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns3.dnsmadeeasy.com
ns2.dnsmadeeasy.com
ns0.dnsmadeeasy.com
ns1.dnsmadeeasy.com
ns4.dnsmadeeasy.com
SPF Record
✓ Strict (-all)
v=spf1 +include:usb._netblocks.mimecast.com +include:_spf.ultipro.com +include:spf.protection.outlook.com ip4:208.75.120.0/22 +include:spf.messagelabs.com +include:outboundmail.blackbaud.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
15 records- apple-domain-verification=q7MabpiCRhreKUjS
- 37f8c6805c27d5fe8648131dcf6b4b2a1b6beabbb4d627f53c
- have-i-been-pwned-verification=45be0f5f0c2d812a08ec12eadf286172
- SPFv=spf1 +include:usb._netblocks.mimecast.com +include:_spf.ultipro.com +include:spf.protection.outlook.com ip4:208.75.120.0/22 +include:spf.messagelabs.com +include:outboundmail.blackbaud.net -all
- O3w9B7f8rI/XjnvX6TE4ypKbvYe5Ri4c/WH1KBlUtcy+bln6xTYJpb/uW/w3UZLAOwpCU6CvLDQBir7m5bUWsg==
- 157C-DC5E-D362-178F-3168-3D4B-04F4-5BFB
- 2f63e54c8611a239a77d7cae793f88bf9227aa31
- reftab-domain-verification=0b1377af99401d298854c8c043fa6103
- teamviewer-sso-verification=d002876c48634622857ddae7fd5a5e57
- docusign=d4c7dcdd-a51d-42cb-a58c-f708c4d6095c
- MS=ms20993489
- adobe-idp-site-verification=141d97adf69b8177360158e06dd75ae10c0fe9549ee491c255b7ae0d8d3103a6
- asv=6291886f37bc8d47f05598c3ac6ee8ef
- _x42fvkcqsoltma81zs1bsyr2yrxhk2q
- MS=1AE57BA837D156167E6D79E2969201263731165D
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