Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
semtech.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 08:03:48 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: 10
A / AAAA Records
- 149.97.171.6 (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
dns1.cscdns.net hostmaster.cscdns.net 2009102473 86400 3600 604800 300
Primary NS (mname)
dns1.cscdns.net
Admin Email (rname)
hostmaster@cscdns.net
Serial
2009102473
Refresh
86400s
Retry
3600s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
dns1.cscdns.net
dns2.cscdns.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:2507363.spf05.hubspotemail.net include:_spf.salesforce.com include:usb._netblocks.mimecast.com ip4:35.164.199.212 ip4:12.155.129.54 ip4:72.38.248.252 ip4:38.104.251.66 ip4:38.107.139.116 ip4:54.240.45.212 ip4:54.240.45.213 ip4:23.251.229.224 ip4:43.228.187.63 -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=none; 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]
↳ Subdomain policy: none
DKIM Selectors
✓ 3 found
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
18 records- apple-domain-verification=GQWnl3kUPa9t4XuP
- h1-domain-verification=1HdHypxv2TBbH8E3peWw5nSaWnvmb8An19zJVmsAav3QAwgm
- docusign=c784a528-fed7-485e-8058-cf1163e81f6d
- 0ed1fe018ac257ae25eecc4ea6b30b9f32ecaf3d95
- cursor-domain-verification-nhjxwd=eYt6Qa8vUGeyhtYlrml8XPiyZ
- 6r07dgqbj84q8m5hikjlat1b54
- atlassian-domain-verification=F7l/pxDrLxwLUjzeNrtPdiruuYKmbv5yI/SrifQSn49pP8yaJFk1pTwA47SWEJlv
- 3mi34010cidfqphd97srfaqgil
- google-site-verification=JoPb-EiUUdG7oiHR4CU0ZskYDM7wJ9m4raWQS6CoBfM
- _gh-hl79mcu-o
- atlassian-domain-verification=fMkkZYJqn2OpOO68FhgCQsUV7s5482R0YP1z2UZjVyH9bgibQHImzBPfyD5oj592
- 0ed1fe018a4870ffd17f2b458ab5a3a1f1992e2972
- smartsheet-site-validation=V7gQH-JYbJQBVoZr7eRHbmzGUKqw0w2K
- 8dEuIM7/8jPfdFjzThA0uis6+GeZw6Ye5v0VXK2flRV5Io24sAaTx6nLMJ1QfnqnqbSQnt0mufjUoKVmS0Gvow==
- SPFv=spf1 include:spf.protection.outlook.com include:2507363.spf05.hubspotemail.net include:_spf.salesforce.com include:usb._netblocks.mimecast.com ip4:35.164.199.212 ip4:12.155.129.54 ip4:72.38.248.252 ip4:38.104.251.66 ip4:38.107.139.116 ip4:54.240.45.212 ip4:54.240.45.213 ip4:23.251.229.224 ip4:43.228.187.63 -all
- atlassian-domain-verification=po3vmLR6jIksDtwR026afdHogrv3YW02GvLYfzw3AVI2stOOGbb8qkHGvgBzGqy0
- anthropic-domain-verification-8kdsc6=aQEWxqJwC1LBC369i5mF311Vn
- hubspot-developer-verification=NGVhMmVlNTktNTM3Ni00MDUwLTk3OTgtNGU4ZDRjZDM5NzU0
Full email verification for semtech.com
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