Republic Bank of Chicago: email security grade B

Home › Financial services › Bank Email Readiness Index › Republic Bank of Chicago

Republic Bank of Chicago, Oak Brook, Illinois, is the 470th largest FDIC-insured US bank by total assets ($2.6bn). On 4 November 2026 the public email records of republicebank.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.

What was found on republicebank.com

Check	Result	What was published
MX	Pass	`0 republicebank-com.mail.protection.outlook.com`. Mail handled by Microsoft 365
SPF	Pass	`v=spf1 a mx include:spf.protection.outlook.com include:spf.emailsignatures365.com ~all`. DNS lookups: 4 of 10 allowed; ends ~all
DMARC	Warn	`v=DMARC1; p=none; rua=mailto:dmarc@qp.republicebank.com`. Policy p=none; reports collected (rua= set)
DKIM	Warn, not graded	Key found on selectors selector1, selector2, dkim (of 10 common selectors tried)

Where Republic Bank of Chicago ranks

Republic Bank of Chicago is the 470th largest FDIC-insured US bank by total assets, at $2.6bn as reported to the FDIC (certificate 19333; Oak Brook, Illinois). Among the 999 graded banks, Republic Bank of Chicago ranks 779th by grade (ties broken by assets, larger first). In its asset band, $1bn to $10bn, it ranks 638th of 846; among the 52 graded banks in Illinois, 48th. 66% of its band and 82.7% 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. Mail is handled by Microsoft 365.
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 4 of the 10 allowed. This count is an estimate.
DMARC, warn: Policy p=none: receivers are asked to do nothing with mail that fails. Reports are on, so you can see what fails.
DMARC, info: Reports go to dmarc@qp.republicebank.com.
DKIM, pass: DKIM key found at selector1._domainkey.republicebank.com, about 1024-bit RSA.
DKIM, pass: DKIM key found at selector2._domainkey.republicebank.com, about 2048-bit RSA.
DKIM, warn: The key at dkim._domainkey is about 768-bit. Google and Yahoo both ask for 1024 bits or longer.

What this means if you sell to Republic Bank of Chicago

Republic Bank of Chicago 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.

Check it live

The records above are from 4 November 2026. Run the same check on republicebank.com now for today's result. The FDIC's record of the bank is at BankFind, certificate 19333.

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 Republic Bank of Chicago 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