`mx1.postmarkapp.com`

DNSSEC	⚠️ Not signed
A	50.31.156.110^{🇺🇸 SERVERCENTRAL50.31.128.0/18}
		PTR	`web.postmarkapp.com`
TXT	`3kc6stb9z74qkxdg404zl20bgsbqp2fh`

`postmarkapp.com`

	DNSSEC	⚠️ Not signed
	A	94.247.142.1^{🇺🇸 CLOUDFLARESPECTRUM94.247.142.0/24}
	NS	`ns-1262.awsdns-29.org` ⭐
	NS	`ns-1657.awsdns-15.co.uk`
	NS	`ns-229.awsdns-28.com`
	NS	`ns-721.awsdns-26.net`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
	MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
	MX	`aspmx2.googlemail.com`⁽³⁰⁾
	MX	`aspmx3.googlemail.com`⁽³⁰⁾
	TXT	`01a65dddcd764010b6df567c88b8fb7d`
	TXT	`abuseipdb-verification=QzehCZYK`
	TXT	`digicert: 00577009 nagele@wildbit.com`
	TXT	`google-site-verification=Bd-0GuslXF2wO_SnN_1pHncqvPZAuCOZxlGaly-V8zI`
	TXT	`google-site-verification=CFwYqNoJsUkztxVzMjK8u1m0_BaklRvOZb5aecNTk8o`
	TXT	`google-site-verification=aRqd5oLuMuPX2-qGutbokgWlmw76Gr68-v_Ryr0Pha8`
	TXT	`v=spf1 a mx include:spf.mtasv.net include:_spf.google.com include:cmail1.com ...`
	SOA	`ns-1262.awsdns-29.org`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (64/100)
rank #19274 globally
rank #9505 in the tld
WOT: SAFE (82/100)
📈 Tranco rank: #23,387

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DNS History

1 record (1 active, 0 former)

●A50.31.156.1102017-11-07 → 2026-05-09 · 2 obs

● 2017-11-07 21:46:26
● 2026-05-09 22:53:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
postmarkapp.com	ns-229.awsdns-28.com, ns-721.awsdns-26.net, ns-1657.awsdns-15.co.uk, ns-1262.awsdns-29.org	2 records

✅ Authoritative Response

Server:205.251.196.238

NS records: ns-229.awsdns-28.com, ns-721.awsdns-26.net, ns-1657.awsdns-15.co.uk, ns-1262.awsdns-29.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for postmarkapp.com (unsigned zone)

⏱️ Timing

Total: 322ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`50.31.156.110`
TXT	1	`3kc6stb9z74qkxdg404zl20bgsbqp2fh`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-229.awsdns-28.com, ns-229.awsdns-28.com)

Analysis

IP Addresses

mx1.postmarkapp.com resolves to one IP number: 50.31.156.110.

other host names including mx.postmarkapp.com, pop3.postmarkapp.com, mx1-ord.postmarkapp.com, imap1.postmarkapp.com and mx1-iad.postmarkapp.com share IP numbers with mx1.postmarkapp.com.

mx1.postmarkapp.com - robtex.com