American First National Bank: email security grade B

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American First National Bank, Houston, Texas, is the 429th largest FDIC-insured US bank by total assets ($2.9bn). On 4 November 2026 the public email records of afnb.com graded B: MX pass, SPF pass, DMARC p=none, mail handled by Mimecast.

Grade B. One setting does less than it seems to. Read by DNS on 4 November 2026; the records are shown as published.

What was found on afnb.com

Check	Result	What was published
MX	Pass	`5 us-smtp-inbound-1.mimecast.com`, `5 us-smtp-inbound-2.mimecast.com`. Mail handled by Mimecast
SPF	Pass	`v=spf1 a mx ip4:192.159.123.186 include:us._netblocks.mimecast.com include:spf.cashedge.com include:spf.protection.outlook.com -all`. DNS lookups: 5 of 10 allowed; ends -all
DMARC	Warn	`v=DMARC1; p=none`. Policy p=none; reports not collected (no rua=)
DKIM	Pass, not graded	Key found on selectors selector1, selector2 (of 10 common selectors tried)

Where American First National Bank ranks

American First National Bank is the 429th largest FDIC-insured US bank by total assets, at $2.9bn as reported to the FDIC (certificate 34656; Houston, Texas). Among the 999 graded banks, American First National Bank ranks 769th by grade (ties broken by assets, larger first). In its asset band, $1bn to $10bn, it ranks 628th of 846; among the 86 graded banks in Texas, 72nd. 66% of its band and 76.7% of its state graded A.

What this means for the bank

The checker's own notes on each record:

MX, pass: 2 MX records. 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: about 5 of the 10 allowed. This count is an estimate.
DMARC, warn: Policy p=none with no rua= address. The record asks receivers to do nothing and sends you no reports.
DKIM, pass: DKIM key found at selector1._domainkey.afnb.com, about 2048-bit RSA.
DKIM, pass: DKIM key found at selector2._domainkey.afnb.com, about 2048-bit RSA.

What this means if you sell to American First National Bank

American First National Bank routes inbound mail through Mimecast, 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.

Check it live

The records above are from 4 November 2026. Run the same check on afnb.com now for today's result. The FDIC's record of the bank is at BankFind, certificate 34656.

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 American First 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