Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
zimbra.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-19 21:23:59 UTC · ↺ Refresh
MX Hostnames
- mta03.zcom.email-ash1.synacor.com
- mail.zimbra.com
- mta04.zcom.email-ash1.synacor.com
MX Priorities
- mail.zimbra.com: 0
- mta03.zcom.email-ash1.synacor.com: 10
- mta04.zcom.email-ash1.synacor.com: 10
A / AAAA Records
- 23.185.0.2 (no PTR)
- 2620:12a:8000::2 (no PTR)
- 2620:12a:8001::2 (no PTR)
Mail Server IPs
- 129.153.230.99 (no PTR)
- 129.80.213.239 ↩ mta03.zcom.email-ash1.synacor.com
- 193.122.157.30 ↩ mta04.zcom.email-ash1.synacor.com
SOA Record
Raw SOA
dns1.p05.nsone.net hostmaster.nsone.net 1653325182 3600 600 604800 3600
Primary NS (mname)
dns1.p05.nsone.net
Admin Email (rname)
hostmaster@nsone.net
Serial
1653325182
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns1.p05.nsone.net
dns2.p05.nsone.net
dns3.p05.nsone.net
dns4.p05.nsone.net
SPF Record
✓ Strict (-all)
v=spf1 ptr mx ip4:52.7.157.95 ip4:52.70.125.224 ip4:52.204.246.185 ip4:52.205.85.65 ip4:66.64.15.66 ip4:167.89.32.168 ip4:173.227.76.247 ip4:14.141.104.38 ip4:193.122.206.174 ip4:193.122.199.60 ip4:129.213.200.110 ip4:150.136.98.232 ip4:150.136.146.2 ip4:129.80.213.239 ip4:193.122.157.30 include:_spf.salesforce.com include:212115.spf01.hubspotemail.net include:4366039.spf01.hubspotemail.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;rua=mailto:[email protected];ruf=mailto:[email protected];aspf=s;sp=none
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- cisco-ci-domain-verification=681f562fa07c58c993c8bfde487542cb70b5b5eef7753e423d2ff666ce4f33b5linkedin-site-verification=ae9a3118-fc72-40a5-9e5a-246a2fda8ebc
- SPFv=spf1 ptr mx ip4:52.7.157.95 ip4:52.70.125.224 ip4:52.204.246.185 ip4:52.205.85.65 ip4:66.64.15.66 ip4:167.89.32.168 ip4:173.227.76.247 ip4:14.141.104.38 ip4:193.122.206.174 ip4:193.122.199.60 ip4:129.213.200.110 ip4:150.136.98.232 ip4:150.136.146.2 ip4:129.80.213.239 ip4:193.122.157.30 include:_spf.salesforce.com include:212115.spf01.hubspotemail.net include:4366039.spf01.hubspotemail.net -all
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