South Shore Bank: email security grade B

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South Shore Bank, South Weymouth, Massachusetts, is the 488th largest FDIC-insured US bank by total assets ($2.5bn). On 4 November 2026 the public email records of southshorebank.com graded B: MX pass, SPF pass, DMARC p=reject, 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 southshorebank.com

Check	Result	What was published
MX	Pass	`10 us-smtp-inbound-1.mimecast.com`, `10 us-smtp-inbound-2.mimecast.com`. Mail handled by Mimecast
SPF	Pass	`v=spf1 redirect=5nn89x3e._spf._d.mim.ec`. DNS lookups: 9 or more of 10 allowed; ends ~all
DMARC	Warn	`v=DMARC1; p=reject; rua=mailto:3d91b95d79d4490@rep.dmarcanalyzer.com; ruf=mailto:3d91b95d79d4490@for.dmarcanalyzer.com; pct=25; fo=1;`. Policy p=reject, applied to 25% of mail; reports collected (rua= set)
DKIM	Pass, not graded	Key found on selector k1 (of 10 common selectors tried)

Where South Shore Bank ranks

South Shore Bank is the 488th largest FDIC-insured US bank by total assets, at $2.5bn as reported to the FDIC (certificate 90303; South Weymouth, Massachusetts). Among the 999 graded banks, South Shore Bank ranks 788th by grade (ties broken by assets, larger first). In its asset band, $1bn to $10bn, it ranks 647th of 846; among the 47 graded banks in Massachusetts, 35th. 66% of its band and 61.7% 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 (softfail): mail from a server that is not on the list is treated as suspect.
SPF, info: The record hands over to 5nn89x3e._spf._d.mim.ec with redirect=, so its ending comes from that record.
SPF, info: DNS lookups: at least 9 of the 10 allowed. One more sending service could push it over. This count is an estimate.
SPF, info: The record uses SPF macros, which only resolve for a real message, so the lookup count is a floor.
DMARC, pass: Policy p=reject: receivers are asked to refuse mail that fails.
DMARC, warn: pct=25: the policy covers only 25% of mail that fails.
DMARC, info: Reports go to 3d91b95d79d4490@rep.dmarcanalyzer.com.
DKIM, pass: DKIM key found at k1._domainkey.southshorebank.com, about 1024-bit RSA.

What this means if you sell to South Shore Bank

South Shore 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 southshorebank.com now for today's result. The FDIC's record of the bank is at BankFind, certificate 90303.

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 South Shore 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