County National Bank: email security grade A

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County National Bank, Hillsdale, Michigan, is the 794th largest FDIC-insured US bank by total assets ($1.4bn). On 4 November 2026 the public email records of cnbb.bank graded A: MX pass, SPF pass, DMARC p=reject, mail handled by Other.

Grade A. Nothing in the records will stop mail. Read by DNS on 4 November 2026; the records are shown as published.

What was found on cnbb.bank

Check	Result	What was published
MX	Pass	`10 allsym.bankonit.bank`. Mail handled by Other
SPF	Pass	`v=spf1 include:_spf.google.com include:spf0.cnbb.bank include:spf.cashedge.com -all`. DNS lookups: 9 or more of 10 allowed; ends -all
DMARC	Pass	`v=DMARC1;p=reject;rua=mailto:dmarc@bankonitusa.com`. Policy p=reject; reports collected (rua= set)
DKIM	Pass, not graded	Key found on selectors s1, s2, mail (of 10 common selectors tried)

Where County National Bank ranks

County National Bank is the 794th largest FDIC-insured US bank by total assets, at $1.4bn as reported to the FDIC (certificate 14073; Hillsdale, Michigan). Among the 999 graded banks, County National Bank ranks 536th by grade (ties broken by assets, larger first). In its asset band, $1bn to $10bn, it ranks 421st of 846; among the 16 graded banks in Michigan, 9th. 66% of its band and 62.5% of its state graded A.

What this means for the bank

The checker's own notes on each record:

MX, pass: 1 MX record. Replies have somewhere to land.
SPF, pass: One SPF record, ending in -all (fail): mail from a server that is not on the list should be rejected.
SPF, info: DNS lookups: at least 9 of the 10 allowed. One more sending service could push it over. This count is an estimate.
SPF, info: The record uses SPF macros, which only resolve for a real message, so the lookup count is a floor.
DMARC, pass: Policy p=reject: receivers are asked to refuse mail that fails.
DMARC, info: Reports go to dmarc@bankonitusa.com.
DKIM, pass: DKIM key found at s1._domainkey.cnbb.bank, about 2048-bit RSA.
DKIM, pass: DKIM key found at s2._domainkey.cnbb.bank, about 2048-bit RSA.
DKIM, pass: DKIM key found at mail._domainkey.cnbb.bank, about 1024-bit RSA.

What this means if you sell to County National Bank

County National Bank's MX hosts belong to a provider we do not name from host names alone. Assume the inbound server checks SPF, DKIM and DMARC and scores reputation, as every major provider does. 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.

Check it live

The records above are from 4 November 2026. Run the same check on cnbb.bank now for today's result. The FDIC's record of the bank is at BankFind, certificate 14073.

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 County National Bank and the records have changed, email moe@roimaxi.com and we will re-check and update this page.

ROI Maximizer is a trading name of M Ventures LTD, registered in England and Wales, company no. 15554493. Registered office: 4 Beau Street, Bath BA1 1QY, United Kingdom. moe@roimaxi.com