Email Authentication

21cn.com

SPF

pass

Declares which servers may send mail for this domain.

v=spf1 include:mail-spf.21cn.com include:mail01-spf.21cn.com include:mail02-spf.21cn.com ip4:52.8.52.154 ip4:52.8.239.192 ip4:52.74.103.30 ip4:52.74.147.196 -all

DKIM

none

Cryptographic signature on outbound mail (selector: none).

No record published.

DMARC

none

Tells receivers what to do with mail that fails SPF/DKIM.

No record published.

Mail Servers (MX)

10 mta.21cn.com

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