Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rtc.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 23:30:37 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-1.mimecast.com: 10
- us-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 23.185.0.4 (no PTR)
Mail Server IPs
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
ns1.shopco.com hostmaster\@shopco.com 8675494 10800 3600 1209600 3600
Primary NS (mname)
ns1.shopco.com
Admin Email (rname)
hostmaster\@shopco@com
Serial
8675494
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns2.shopco.com
ns3.shopco.com
ns1.shopco.com
SPF Record
✓ Strict (-all)
v=spf1 mx mx:mx.na1.hgncloud.com include:us._netblocks.mimecast.com include:_spf.salesforce.com ip4:66.238.176.128/25 ip4:209.202.151.88 ip4:209.202.151.104 ip4:64.89.44.203 ip4:4.35.103.171 include:electric.net include:_spf.elasticemail.com -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
14 records- @39crf8smtmd0fggt80qg0ag734
- aa6k1ga5o2egfehk2bg24tfmsg
- jSNqrGJR3NK+FVUl8mBnKwBLnyJtlq/ZvpO5dLyyMI4717JVX2VdY8PTTEQM84j8hedVlYjerSFyI/vWcUf1IA==
- 107kndfoaluf2kv3pj8bjvuktd
- MS=ms40192362
- MS=ms53734608
- sq904ahfqsjc1qba1et6eq9dpk
- ukqfl3sjdfmsacslu92qrddtrr
- _dmarc.rtc.com
- @cgna4hvuebroaf62qg841vj2c0
- cm._domainkey.rtc.com
- oip3i92870hhd6ttq11sc0hv3s
- SPFv=spf1 mx mx:mx.na1.hgncloud.com include:us._netblocks.mimecast.com include:_spf.salesforce.com ip4:66.238.176.128/25 ip4:209.202.151.88 ip4:209.202.151.104 ip4:64.89.44.203 ip4:4.35.103.171 include:electric.net include:_spf.elasticemail.com -all
- DMARCv=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
Full email verification for rtc.com
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