Zoho Mail privacy rating

Summary

Zoho Mail scores 45 out of 100 (grade D) on the email providers criteria. It meets 7 of 19 criteria: no ads or data sales, TLS configuration, security headers, open protocols, custom domains, IMAP support and POP3 support. It partly meets no trackers or telemetry, end-to-end encryption, encrypted mailbox storage and SMTP submission. It does not meet open source, independent audit, transparency report, tells users about requests, sign up without personal data, mail transport security, Sender Rewriting Scheme and ARC sealing. It is based in India: Not in the Five, Nine or Fourteen Eyes. Automated tests: SSL Labs grade A+ and Mozilla HTTP Observatory grade A+.

Score 45 out of 100. How scoring works

Criteria

• ✖No

  Open source ×3Weight 3 of 3

  Is all the source code needed to run the product public?

  Closed source.

• ◐Partial

  No trackers or telemetry ×3Weight 3 of 3

  Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?

  Zoho states it blocks non-essential third-party cookies on its sites and mostly uses first-party cookies for analytics.

  zoho.com

• ✔Yes

  No ads or data sales ×2Weight 2 of 3

  Is the product funded without advertising, ad targeting or selling user data?

  Funded by paid plans. Zoho states that it never shows ads or sells data, including on free plans.

  zoho.com

• ✖No

  Independent audit ×2Weight 2 of 3

  Has an independent security or privacy audit been published within the last three years?

  No independent audit is published.

• ✖No

  Transparency report ×2Weight 2 of 3

  Does the provider regularly publish how many government and legal requests it receives and how it responds?

  No transparency report or government request policy is published.

• ✖No

  Tells users about requests ×1Weight 1 of 3

  Does the provider promise to tell users about requests for their data, unless a court forbids it?

  No published policy on notifying users about data requests.

• ◐Partial

  End-to-end encryption ×3Weight 3 of 3

  Can mail be end-to-end encrypted so that the provider cannot read message contents?

  S/MIME and OpenPGP encryption are available but not on by default.

  zoho.com

• ◐Partial

  Encrypted mailbox storage ×3Weight 3 of 3

  Is stored mail encrypted with a key the provider does not hold?

  Mail is encrypted at rest with keys Zoho holds.

  zoho.com

• ✔Yes

  Open protocols ×2Weight 2 of 3

  Can any standard app connect over IMAP, POP3, SMTP, CalDAV or CardDAV, without extra software?

  IMAP, POP3 and SMTP work on paid plans. New free accounts have no IMAP or POP3.

  zoho.com

• ✔Yes

  Custom domains ×1Weight 1 of 3

  Can mail be sent and received with your own domain?

  Available on every plan, including the free one.

  zoho.com

• ✖No

  Sign up without personal data ×2Weight 2 of 3

  Can an account be created without a phone number or another email address?

  Sign-up asks for a name, contact number and email address.

  zoho.com

• ✖No

  Sender Rewriting Scheme ×1Weight 1 of 3

  Is the envelope sender rewritten with SRS when mail is forwarded, so forwarded mail keeps passing SPF?

  No published documentation on SRS for forwarded mail.

• ✖No

  ARC sealing ×1Weight 1 of 3

  Does the provider validate and add ARC (RFC 8617) signatures, so authentication results survive forwarding?

  No published documentation on ARC signing or validation.

Automated tests

• ✔Yes

  TLS configuration ×2Weight 2 of 3

  Does the website pass the Qualys SSL Labs test with a grade of A or better?

  Grade A+

  ssllabs.com

• ✔Yes

  Security headers ×1Weight 1 of 3

  Does the website pass the Mozilla HTTP Observatory test with a grade of A or better?

  Grade A+ (110/100+)

  developer.mozilla.org

• …Not tested yet

  Modern web standards ×1Weight 1 of 3

  Does the website score 90% or higher on the Internet.nl website test?

  Not tested yet.

• …Not tested yet

  Email security standards ×2Weight 2 of 3

  Does the mail domain score 90% or higher on the Internet.nl email test?

  Not tested yet.

• ✔Yes

  IMAP support ×2Weight 2 of 3

  Does the IMAP server accept connections over implicit TLS on port 993 and advertise IMAP4rev1 or IMAP4rev2 with IDLE push?

  imap.zoho.com:993 (implicit TLS). IMAP4rev1 advertised with IDLE.

• ✔Yes

  POP3 support ×1Weight 1 of 3

  Does the POP3 server accept connections over implicit TLS on port 995 and answer CAPA with UIDL?

  pop.zoho.com:995 (implicit TLS). CAPA: USER, TOP, UIDL, SASL.

• ◐Partial

  SMTP submission ×2Weight 2 of 3

  Does mail submission work over implicit TLS on port 465 with SMTPUTF8, 8BITMIME, PIPELINING and AUTH?

  smtp.zoho.com:465 (implicit TLS). Missing: SMTPUTF8, 8BITMIME, PIPELINING.

• ✖No

  Mail transport security ×3Weight 3 of 3

  Does the mail domain enforce encrypted, authenticated delivery with MTA-STS, DANE, DNSSEC, TLS-RPT and an enforced DMARC policy?

  Passes: SPF, DMARC reject, TLS-RPT. Missing: MTA-STS missing, DNSSEC, DANE none.

Email standards

• ✔Yes: Mail serversMXsmtpin.zoho.com, smtpin2.zoho.com, smtpin3.zoho.com
• ✔Yes: RFC 7208 sender policySPFpublished
• ✔Yes: RFC 7489. Quarantine or reject counts as enforcedDMARCp=reject
• ✖No: RFC 8461 strict transport securityMTA-STSmissing
• ✔Yes: RFC 8460 TLS failure reportsTLS-RPTpublished
• ✖No: RFC 4033 signed DNSDNSSECnot validated
• ✖No: RFC 7672 TLSA records on MX hostsDANEnone
• ✖No: Brand logo record (not scored)BIMInone
• ✖No: RFC 6186 and RFC 8314 service records (not scored)SRVnone

Capabilities are what each server advertises before login. How these tests work