Commercial Bank & Trust Co.: email security grade A

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Commercial Bank & Trust Co., Paris, Tennessee, is the 960th largest FDIC-insured US bank by total assets ($1.1bn). On 4 November 2026 the public email records of cbtcnet.com graded A: MX pass, SPF pass, DMARC p=quarantine, mail handled by Mimecast.

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 cbtcnet.com

Check	Result	What was published
MX	Pass	`0 us-smtp-inbound-1.mimecast.com`, `0 us-smtp-inbound-2.mimecast.com`. Mail handled by Mimecast
SPF	Pass	`v=spf1 include:_spf.createsend.com include:us._netblocks.mimecast.com mx ip4:216.116.80.85 ip4:216.116.87.142 ip4:74.200.60.34 ip4:74.200.63.122 ip4:216.116.87.64 ip4:216.116.87.11 ip4:74.200.60.12 ip4:192.254.121.248 include:spf1.netteller.com include:_phishspf.knowbe4.com include:spf.protection.outlook.com ~all`. DNS lookups: 6 of 10 allowed; ends ~all
DMARC	Pass	`v=DMARC1; p=quarantine; rua=mailto:DMARCreports@cbtcnet.com; ruf=mailto:DMARCreports@cbtcnet.com;`. Policy p=quarantine; reports collected (rua= set)
DKIM	Pass, not graded	Key found on selector selector2 (of 10 common selectors tried)

Where Commercial Bank & Trust Co. ranks

Commercial Bank & Trust Co. is the 960th largest FDIC-insured US bank by total assets, at $1.1bn as reported to the FDIC (certificate 8660; Paris, Tennessee). Among the 999 graded banks, Commercial Bank & Trust Co. ranks 644th by grade (ties broken by assets, larger first). In its asset band, $1bn to $10bn, it ranks 529th of 846; among the 31 graded banks in Tennessee, 16th. 66% of its band and 54.8% 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 (softfail): mail from a server that is not on the list is treated as suspect.
SPF, info: DNS lookups: about 6 of the 10 allowed. This count is an estimate.
DMARC, pass: Policy p=quarantine: receivers are asked to put mail that fails in spam.
DMARC, info: Reports go to DMARCreports@cbtcnet.com.
DKIM, pass: DKIM key found at selector2._domainkey.cbtcnet.com, about 1024-bit RSA.

What this means if you sell to Commercial Bank & Trust Co.

Commercial Bank & Trust Co. 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 cbtcnet.com now for today's result. The FDIC's record of the bank is at BankFind, certificate 8660.

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 Commercial Bank & Trust Co. 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