Hi, I'm an email server administrator.
Checking logs on my email server (a script automatically update, parsing spf records of well know senders, a whitelist to avoid "false positive") I noticed that there is a wrong entry in the spf record of zoho.com and zcsend.net domain:

2607:13c0:0002::1000/115 (is formally wrong, this generate a parsing error, maybe it's a typo error)

should be:
2607:13c0:0002::1000/116 (network range: 2607:13c0:0002::1000 - 2607:13c0:0002::1fff)