Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
303software.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 20:41:00 UTC · ↺ Refresh
MX Hostnames
- mail.303software.com
- alt1.aspmx.l.google.com
- aspmx3.googlemail.com
- aspmx.l.google.com
- alt2.aspmx.l.google.com
- aspmx2.googlemail.com
MX Priorities
- aspmx.l.google.com: 1
- aspmx2.googlemail.com: 10
- aspmx3.googlemail.com: 10
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- mail.303software.com: 50
A / AAAA Records
- 198.202.211.1 (no PTR)
Mail Server IPs
- 172.253.122.27 ↩ bh-in-f27.1e100.net
- 2607:f8b0:4004:c21::1b ↩ pe-in-f27.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
SOA Record
Raw SOA
ns-402.awsdns-50.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-402.awsdns-50.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1305.awsdns-35.org
ns-1693.awsdns-19.co.uk
ns-402.awsdns-50.com
ns-594.awsdns-10.net
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx include:_spf.mlsend.com ?all
📊 DNS lookups: 3/10
? Neutral (?all) — no enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; fo=1; pct=100
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- google-site-verification=zFGYwDVpz7WyaPQA0i_VBArBPNgTNBotlZDFiVhWlAQ
- SPFv=spf1 a mx include:_spf.mlsend.com ?all
- google-site-verification=Ad1_v2eASlZsiWJJsrkSOoo1hFNg4C2i-nHp2yo-ITk
- google-site-verification=jlUa6DMPx1aFggCJZ5wQoAemWGo1aS79tOevlJBI6eg
- google-site-verification=x-TLb61JRsU07yqBb9-Gl3VqiaR1kMQHjnJ1559nq4I
Full email verification for 303software.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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