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Citizens Business Bank, Ontario, California, is the 99th largest FDIC-insured US bank by total assets ($21bn). On 4 November 2026 the public email records of cbbank.com graded A: MX pass, SPF pass, DMARC p=reject, mail handled by Proofpoint.
Grade A. Nothing in the records will stop mail. Read by DNS on 4 November 2026; the records are shown as published.
| Check | Result | What was published |
|---|---|---|
| MX | Pass | 10 mxa-00612a01.gslb.pphosted.com, 10 mxb-00612a01.gslb.pphosted.com. Mail handled by Proofpoint |
| SPF | Pass | v=spf1 include:cbbank.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all. DNS lookups: 2 or more of 10 allowed; ends ~all |
| DMARC | Pass | v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email,mailto:emailalerts@cbbank.com; ruf=mailto:emailalerts@cbbank.com. Policy p=reject; reports collected (rua= set) |
| DKIM | Pass, not graded | Key found on selectors s1, s2 (of 10 common selectors tried) |
Citizens Business Bank is the 99th largest FDIC-insured US bank by total assets, at $21bn as reported to the FDIC (certificate 21716; Ontario, California). Among the 999 graded banks, Citizens Business Bank ranks 79th by grade (ties broken by assets, larger first). In its asset band, $10bn to $100bn, it ranks 49th of 122; among the 58 graded banks in California, 6th. 69.7% of its band and 62.1% of its state graded A.
The checker's own notes on each record:
Citizens Business Bank routes inbound mail through Proofpoint, a filtering gateway. Expect strict inbound filtering: a message from a sender whose SPF, DKIM or DMARC fails, or whose domain has little sending history, is unlikely to reach a person. Before you send, run your own domain through the email setup checker and publish a policy with the DMARC record generator. For how a bank buys, see the selling to banks playbook.
The records above are from 4 November 2026. Run the same check on cbbank.com now for today's result. The FDIC's record of the bank is at BankFind, certificate 21716.
This page is one of 1,000 in the Bank Email Readiness Index Q4 2026, published 4 November 2026 and re-read every quarter; the next edition is due 2 February 2027. If you work at Citizens Business Bank and the records have changed, email moe@roimaxi.com and we will re-check and update this page.
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