Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
deljoheating.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 15:11:00 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
- us-smtp-inbound-1.mimecast.com: 10
- us-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 104.21.10.136 (no PTR)
- 172.67.131.125 (no PTR)
- 2606:4700:3034::ac43:837d (no PTR)
- 2606:4700:3035::6815:a88 (no PTR)
Mail Server IPs
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
guy.ns.cloudflare.com dns.cloudflare.com 2397343779 10000 2400 604800 1800
Primary NS (mname)
guy.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397343779
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
guy.ns.cloudflare.com
paislee.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ptr include:us._netblocks.mimecast.com include:_spf.psm.knowbe4.com include:relay.mailchannels.net ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 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
5 records- SPFv=spf1 mx ptr include:us._netblocks.mimecast.com include:_spf.psm.knowbe4.com include:relay.mailchannels.net ~all
- 0ed1fe018ae6ecca79abb54a90a671c4ff550aa948
- 1KXHG4KL6E35R0KWF2I2ZRZX1HNBQZBQ7TEMG4YR
- google-site-verification=QPtXZS23Znms7h80_c_IEwlJLpER7ZbT0p8rgLko460
- google-site-verification=SUXL-PG57W5AoC7CzSqOmp197e9u3cysvtUCL9qhEOs
Full email verification for deljoheating.com
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