Abacus Research

abacus.ch

Industry: Telecom, IT & media
Headquarters: Wittenbach, St. Gallen
Type: private
Employees (approx.): 600
Checked on: 19 October 2026

89/100Grade A

Protection against forged senders: largely protected

Points per criterion

MX 10 / 10
SPF 13 / 15
DKIM 20 / 20
DMARC 19 / 25
DNSSEC 10 / 10
Transport (MTA-STS/DANE) 12 / 15
TLS-RPT 5 / 5

Industry avg.: 63.6 ▲ 25.4
Canton avg.: 52.3 ▲ 36.7
Overall avg.: 53.5 ▲ 35.5
Rank 3 of 50 in the industry

Findings

!DKIM key below 2048 bits

RSA-1024 is considered too weak (RFC 8301, M3AAWG). Rotate to 2048-bit keys.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Microsoft 365
Provider jurisdiction: USA · MX: US
Detection confidence: 100 / 100
Microsoft tenant: Federated · Abacus Research AG
Tenant region: EU
Federated via: login.abacus.ch

Signals (10)

MX	Microsoft 365	`abacus-ch.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-abacus-ch._domainkey.abacusresearchag.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms23041915`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
SPF	Google Workspace	`include:_spf.google.com`
DKIM	Google Workspace	`google`
Domain verification	Google Workspace	`google-site-verification=d0Brpk4qn89HHRQ`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Federated)`

MX servers

Pref	Host	IP	Network	Country	TLSA
5	`abacus-ch.mail.protection.outlook.com`	`52.101.103.39`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.73.145`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.68.39`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 mx include:spf.abacus.ch ip4:62.106.93.27 ip4:185.16.173.0/27 ip6:2a03:da40:0:aa::/64 include:spf.mandrillapp.com include:servers.mcsv.net include:_spf.google.com include:spf.protection.outlook.com ~all

all: ~all
DNS lookups: 6 / 10
Includes: spf.abacus.chspf.mandrillapp.comservers.mcsv.net_spf.google.comspf.protection.outlook.com
Detected sending services: Mailchimp/Mandrill, Mailchimp Transactional, Google, Microsoft 365
IPv4: 33 addresses authorised directly

DMARC

v=DMARC1; p=quarantine; rua=mailto:48dc0de3@in.mailhardener.com; fo=1:d:s;

Policy: p=quarantine
Subdomains (sp): inherits p=quarantine
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): 48dc0de3@in.mailhardener.com
Report services: Mailhardener

DKIM

Selector	Key	delegated to
`google`	RSA 2048	–
`k1`	RSA 1024	`dkim.mcsv.net`
`k2`	RSA 2048	`dkim2.mcsv.net`
`k3`	RSA 2048	`dkim3.mcsv.net`
`mail`	RSA 2048	–
`mandrill`	RSA 1024	–
`s1`	RSA 2048	–
`s2`	RSA 2048	–
`selector1`	RSA 1024	`selector1-abacus-ch._domainkey.abacusresearchag.onmicrosoft.com`
`selector2`	RSA 1024	`selector2-abacus-ch._domainkey.abacusresearchag.onmicrosoft.com`

Checked: 100 common selectors. Keys under custom selectors remain invisible.

Transport encryption

MTA-STS: Mode: enforce · max_age: 1,209,600 s · covers all MX: yes
mx: abacus-ch.mail.protection.outlook.com
DANE: missing
DNSSEC: active
TLS-RPT: mailto:48dc0de3@in.mailhardener.com
BIMI: missing

Verified services

From verification records in the domain TXT: services where the domain is verified.

Microsoft 365GoogleAppleZoomMiro

History

18 October 2026 Score 89 · DMARC quarantine

All changes of this organisation in the change log →

Raw data

abacus.ch. IN MX 5 abacus-ch.mail.protection.outlook.com.
abacus.ch. IN TXT "v=spf1 mx include:spf.abacus.ch ip4:62.106.93.27 ip4:185.16.173.0/27 ip6:2a03:da40:0:aa::/64 include:spf.mandrillapp.com include:servers.mcsv.net include:_spf.google.com include:spf.protection.outlook.com ~all"
_dmarc.abacus.ch. IN TXT "v=DMARC1; p=quarantine; rua=mailto:48dc0de3@in.mailhardener.com; fo=1:d:s;"
_mta-sts.abacus.ch. IN TXT "v=STSv1; id=20190601000000Z"
_smtp._tls.abacus.ch. IN TXT "v=TLSRPTv1; rua=mailto:48dc0de3@in.mailhardener.com"

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