What’s unique about corporate domains vs consumer ISPs?
Corporate email environments differ significantly:
Security gateways: Proofpoint, Mimecast, Barracuda, and others add filtering layers before messages reach Exchange or Gmail Workspace.
Stricter policies: Administrators configure aggressive filtering for security.
Quarantine: Messages may be held for admin review rather than delivered or rejected.
Custom rules: Organization-specific blocking or allowing.
Compliance requirements: Industry regulations may drive filtering decisions.
B2B senders face different challenges than B2C senders targeting consumer inboxes.
Corporate harbors have their own security teams with custom inspection procedures.
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