OpenBSD Handbook

Current snapshot · amd64 · Generated 2026-09-09

smtpscan-0.5p1

Remote SMTP Server Detection

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Description

smtpscan is a remote SMTP server version detector. It can be used to guess which mail software is used on a remote server, that may hide its SMTP banner. smtpscan works by testing the remote SMTP server reaction, thanks to tests defined in the tests (${PREFIX}/share/smtpscan/tests) file. Almost all of those tests consists in weird SMTP request, whose answer is not precisely defined in the corresponding RFCs. Some other times, they check whether the remote SMTP server is simply RFC compliant. After each test, remote server returns a SMTP Error Message. Fingerprints are made of SMTP Error Messages corresponding to the tests.

Package information

Ports path
security/smtpscan
Package architecture
*
Maintainer
The OpenBSD ports mailing-list <ports@openbsd.org>
Categories
security, net, mail
Available flavors
None listed

These are ports metadata. Binary availability depends on the release, architecture and mirror. Build and test dependencies are not an installation checklist.

Direct dependencies

Runtime

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