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Authentication Authentication IMAP (Ports 143 / 993) IMAP (Ports 143 / 993) Phase 2: Mail Hygiene Phase 2: Mail Hygiene Phase 3: Admin & Operations Phase 3: Admin & Operations Phase 4: Hardening Phase 4: Hardening SMTP — Inbound (Port 25) SMTP — Inbound (Port 25) SMTP — Submission (Ports 587 / 465) SMTP — Submission (Ports 587 / 465) Storage Storage TLS TLS

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blakeridgway

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Authentication

Authentication

IMAP (Ports 143 / 993)

IMAP (Ports 143 / 993)

Phase 2: Mail Hygiene

Phase 2: Mail Hygiene

Phase 3: Admin & Operations

Phase 3: Admin & Operations

Phase 4: Hardening

Phase 4: Hardening

SMTP — Inbound (Port 25)

SMTP — Inbound (Port 25)

SMTP — Submission (Ports 587 / 465)

SMTP — Submission (Ports 587 / 465)

Storage

Storage

TLS

TLS

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blakeridgway

DNSBL checks on inbound connections (basic blocklist)

phase-2

#30 opened 2026-04-16 20:56:22 -05:00 by blakeridgway Phase 2: Mail Hygiene

Reject or quarantine based on DMARC policy

phase-2

#29 opened 2026-04-16 20:56:21 -05:00 by blakeridgway Phase 2: Mail Hygiene

DMARC policy parsing and enforcement

phase-2

#28 opened 2026-04-16 20:56:19 -05:00 by blakeridgway Phase 2: Mail Hygiene

SPF record lookup and enforcement

phase-2

#27 opened 2026-04-16 20:56:17 -05:00 by blakeridgway Phase 2: Mail Hygiene

DKIM verification on inbound mail

phase-2

#26 opened 2026-04-16 20:56:16 -05:00 by blakeridgway Phase 2: Mail Hygiene

DKIM signing on outbound mail

phase-2

#25 opened 2026-04-16 20:56:14 -05:00 by blakeridgway Phase 2: Mail Hygiene