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CoreFirst Bank & Trust, Topeka, Kansas, is the 851st largest FDIC-insured US bank by total assets ($1.3bn). On 4 November 2026 the public email records of cbtks.com graded B: MX pass, SPF pass, DMARC p=none, mail handled by Microsoft 365.
Grade B. One setting does less than it seems to. Read by DNS on 4 November 2026; the records are shown as published.
| Check | Result | What was published |
|---|---|---|
| MX | Pass | 10 cbtks-com.mail.protection.outlook.com. Mail handled by Microsoft 365 |
| SPF | Pass | v=spf1 ip4:72.42.249.0/24 ip4:12.165.112.51/32 ip4:12.165.112.53/32 include:spfhost.messageprovider.com include:sendgrid.net include:jhahosted.com include:spfref.jackhenry.com include:spf.protection.outlook.com ~all. DNS lookups: 6 of 10 allowed; ends ~all |
| DMARC | Warn | v=DMARC1; p=none; rua=mailto:b0u4svg2@ag.us.dmarcian.com;. Policy p=none; reports collected (rua= set) |
| DKIM | Pass, not graded | Key found on selector selector1 (of 10 common selectors tried) |
CoreFirst Bank & Trust is the 851st largest FDIC-insured US bank by total assets, at $1.3bn as reported to the FDIC (certificate 18100; Topeka, Kansas). Among the 999 graded banks, CoreFirst Bank & Trust ranks 868th by grade (ties broken by assets, larger first). In its asset band, $1bn to $10bn, it ranks 727th of 846; among the 19 graded banks in Kansas, 15th. 66% of its band and 63.2% of its state graded A.
The checker's own notes on each record:
CoreFirst Bank & Trust receives mail through Microsoft 365, whose Exchange Online Protection checks every inbound message's SPF, DKIM and DMARC and scores the sender's reputation. A clean, warmed sending domain is the minimum; a failed check lands in junk or is dropped. 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 cbtks.com now for today's result. The FDIC's record of the bank is at BankFind, certificate 18100.
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 CoreFirst Bank & Trust and the records have changed, email moe@roimaxi.com and we will re-check and update this page.
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