`mail.syn.io`

DNSSEC	⚠️ Not signed
A	37.97.181.42^{🇳🇱 TRANSIP-AS37.97.128.0/17 TransIP BV Amsterdam, The Netherlands}
		PTR	`mail.synio.be`
MX	`feedback-smtp.eu-central-1.amazonses.com` ⭐
		A	3.120.127.53^{🇩🇪 Amazon3.120.0.0/14 EC2 FRA prefix}
			PTR	`ec2-3-120-127-53.eu-central-1.compute.amazonaws.com`
		A	18.184.194.231^{🇩🇪 Amazon18.184.0.0/15 EC2 FRA prefix}
			PTR	`ec2-18-184-194-231.eu-central-1.compute.amazonaws.com`
		A	52.59.27.99^{🇩🇪 Amazon52.58.0.0/15 EC2 FRA Prefix}
			PTR	`ec2-52-59-27-99.eu-central-1.compute.amazonaws.com`
TXT	`v=spf1 include:amazonses.com ~all`

`syn.io`

	DNSSEC	🔒 Signed (DS record present)
	A	37.97.181.42^{🇳🇱 TRANSIP-AS37.97.128.0/17 TransIP BV Amsterdam, The Netherlands}
	NS	`adrian.ns.cloudflare.com` ⭐
	NS	`clay.ns.cloudflare.com`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽⁵⁾
	MX	`alt2.aspmx.l.google.com`⁽⁵⁾
	MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
	MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
	TXT	`MS=9825DA2DA57D454358321D9557A53F0B229BA214`
	TXT	`google-site-verification=Fi0ZNqNOwbPDfCMUIkmw1yC0UjkTU4ewCLzl5OagkeM`
	TXT	`google-site-verification=sA8oXTEuPAX-zXE3VY9NU86d5EUitnBlI9v5qw61AFM`
	TXT	`v=spf1 a mx ip4:37.97.181.42 ip6:2a01:7c8:aac1:6f4:5054:ff:fe0c:5d62 ip6:2a01...`
	SOA	`adrian.ns.cloudflare.com`dns@cloudflare.com serial=2410488943

MX for

s2.syn.io

Previously MX for

syn.io

Same first word

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DNS History

2 records (2 active, 0 former)

●MXfeedback-smtp.eu-central-1.amazonses.com2026-04-20 → 2026-07-29 · 2 obs

● 2026-04-20 20:31:42
● 2026-07-29 00:26:14

●A37.97.181.422019-03-25 → 2026-07-29 · 2 obs

● 2019-03-25 12:26:22
● 2026-07-29 00:26:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
io	a2.nic.io, a0.nic.io, c0.nic.io, b0.nic.io	-
syn.io	adrian.ns.cloudflare.com, clay.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.57

NS records: adrian.ns.cloudflare.com, clay.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 465ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`37.97.181.42`
MX	1	`feedback-smtp.eu-central-1.amazonses.com`
TXT	1	`v=spf1 include:amazonses.com ~all`

Analysis

Mail Server Role

mail.syn.io is a mail server for s2.syn.io.

IP Addresses

mail.syn.io directs to one IP number, which is 37.97.181.42.

Among the host names that share IP numbers with mail.syn.io are maisonsouslepont.fr, mail.maisonsouslepont.fr, mail.synio.be and two others.

Mail Servers

mail.syn.io routes its mail through a single mail server, feedback-smtp.eu-central-1.amazonses.com.

mail.syn.io has the same mail server arrangement as a number of other domains, for example mail.sundaysforlife.org, zahide.com, mail.gomystay.com and two more.

mail.syn.io shares at least some of its mail servers with other domains — for example tkt.am, queenturkiye.com.tr, dphosting.at and two more.

It is common to find these mail servers paired with mail servers mx-01.kurumsaleposta.com, mx-02.kurumsaleposta.com, aspmx.l.google.com and 5 more.

The hostname feedback-smtp.eu-central-1.amazonses.com carries three IP records: 3.120.127.53, 18.184.194.231 and 52.59.27.99.

mail.syn.io - robtex.com

mail.syn.io

syn.io