Yes — webmail.transip.nl has IPv6.

Has both IPv4 (A) and IPv6 (AAAA) addresses.

B
IPv6 readiness
Works over IPv6, with one gap: its mail servers lack IPv6.
Website over IPv6
webmail.transip.nl has an AAAA record and answers on it.
✓ 2a01:7c8:e100:1::7254 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
mail1.transip.nl ✗
no
Nameservers have IPv6
3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.
ns0.transip.net ✓ns1.transip.nl ✓ns2.transip.eu ✓
yes
HTTPS over IPv6 · not part of the grade yet
The certificate served over IPv6 at 2a01:7c8:e100:1::7254 isn't valid for transip.email: UNABLE_TO_VERIFY_LEAF_SIGNATURE.
https://webmail.transip.nl/ via 2a01:7c8:e100:1::7254 → 302https://transip.email/ via 2a01:7c8:e100:1::7254 · UNABLE_TO_VERIFY_LEAF_SIGNATURE
problem
 Load webmail.transip.nl over IPv6 from up to six other places — a second opinion.

What's keeping webmail.transip.nl from an A

  1. The certificate served over IPv6 is wrong
    The certificate served over IPv6 at 2a01:7c8:e100:1::7254 isn't valid for transip.email: UNABLE_TO_VERIFY_LEAF_SIGNATURE. Often the IPv6 address points at a different server (or an old one) than IPv4 does. Make sure 2a01:7c8:e100:1::7254 serves the same certificate as your IPv4 address.
  2. Mail servers without IPv6
    mail1.transip.nl has no AAAA record, so mail from IPv6-only servers can't reach it directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

webmail.transip.nl  Has IPv6

Alias oftransip.email
A (IPv4)86.105.244.3
AAAA (IPv6)2a01:7c8:e100:1::7254

Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).

Copy the evidence — a citation-ready record of this measurement

 Permanent link: aaaa.bot/r/EFzhTXr1VV · How we measure

Checked 2026-11-01 09:00:48 UTC. Full DNS report: dns.pizza/domain/webmail.transip.nl · JSON: /api/v1/webmail.transip.nl