Zoho CRM email authentication
Zoho’s CRM and campaign sending infrastructure.
SPF record
Add Zoho CRM to your domain's SPF record with this include:
include:zcsend.net
A complete record for a domain sending only through Zoho CRM:
v=spf1 include:zcsend.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 10 IP ranges.
Live record
This is what zcsend.net published when this page was generated:
v=spf1 ip4:135.84.81.0/24 ip4:135.84.83.0/24 ip4:136.143.160.0/24 ip4:165.173.128.0/24 ip4:135.84.82.0/24 ip4:136.143.161.0/24 ip4:136.143.162.0/24 ip6:2607:13c0:0001:0000:0000:0000:0000:7000/116 ip6:2607:13c0:0002:0000:0000:0000:0000:1000/116 ip6:2607:13c0:0004:0000:0000:0000:0000:0000/116 ~all
Domains using Zoho CRM
Found while resolving 293 well-known domains on 2026-08-04 — each authorises
zcsend.net in its published SPF record:
DKIM
Enable DKIM inside Zoho CRM 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 Zoho CRM 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.