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Great Southern Bank, Reeds Spring, Missouri, is the 256th largest FDIC-insured US bank by total assets ($5.5bn). On 4 November 2026 the public email records of greatsouthernbank.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.
| Check | Result | What was published |
|---|---|---|
| MX | Pass | 20 us-smtp-inbound-1.mimecast.com, 20 us-smtp-inbound-2.mimecast.com. Mail handled by Mimecast |
| SPF | Pass | v=spf1 ip4:192.254.115.141 a:mail.greatsouthernbank.com include:us._netblocks.mimecast.com include:servers.mcsv.net include:spf1.netteller.com include:spfref.jackhenry.com include:spf01.greatsouthernbank.com include:spf02.greatsouthernbank.com include:spf.protection.outlook.com -all. DNS lookups: 10 of 10 allowed; ends -all |
| DMARC | Pass | v=DMARC1; p=quarantine; rua=mailto:32de59f1ebd4190@rep.dmarcanalyzer.com; ruf=mailto:32de59f1ebd4190@for.dmarcanalyzer.com; fo=1;. Policy p=quarantine; reports collected (rua= set) |
| DKIM | Pass, not graded | Key found on selectors k1, s1, s2 (of 10 common selectors tried) |
Great Southern Bank is the 256th largest FDIC-insured US bank by total assets, at $5.5bn as reported to the FDIC (certificate 29546; Reeds Spring, Missouri). Among the 999 graded banks, Great Southern Bank ranks 188th by grade (ties broken by assets, larger first). In its asset band, $1bn to $10bn, it ranks 73rd of 846; among the 35 graded banks in Missouri, 3rd. 66% of its band and 57.1% of its state graded A.
The checker's own notes on each record:
Great Southern 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.
The records above are from 4 November 2026. Run the same check on greatsouthernbank.com now for today's result. The FDIC's record of the bank is at BankFind, certificate 29546.
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 Great Southern Bank and the records have changed, email moe@roimaxi.com and we will re-check and update this page.
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