Mailchimp email authentication
The best-known small-business newsletter platform.
SPF record
Add Mailchimp to your domain's SPF record with this include:
include:servers.mcsv.net
A complete record for a domain sending only through Mailchimp:
v=spf1 include:servers.mcsv.net ~all
What it costs you
1 of your 10 DNS lookups. That is the cheapest an include can be — the record it points at contains only IP ranges, with no further includes to follow. Behind it are 3 IP ranges.
Live record
This is what servers.mcsv.net published when this page was generated:
v=spf1 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.0.0/16 -all
Domains using Mailchimp
Found while resolving 293 well-known domains on 2026-08-04 — each authorises
servers.mcsv.net in its published SPF record:
DKIM
Enable DKIM inside Mailchimp and publish the selector record it generates. DKIM matters more than SPF for deliverability, because a DKIM signature survives forwarding while SPF does not — see how selectors work.
DMARC
Neither SPF nor DKIM protects the address your recipients actually see until DMARC ties them
to it. Once Mailchimp is authenticating, publish a DMARC record — start at
p=none with a reporting address and
tighten from there.
Check it worked
DNS changes take minutes to hours to propagate. Once published, run the domain through the checker — it resolves the full include chain and reports the real lookup count.