Trace Exim address routing without sending mail
Build a paste-ready command, then review its compatibility and effects before running it.
exim -bt user@example.comread-onlyno known side effects Compatibility
LinuxVerified for Linux using posix, bash, zsh syntax.
Operational knowledgereview due 2027-01-20
Requirementseximexim must be installed and available on PATH.
Version supportexim Current supported releasesVerified for linux using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.
Expected signalsuser@example.comRepresentative successful output; values vary with the selected target and system state.
Known errorsexim: command not foundexim is missing or is not available on PATH.
Verifyexim -bt user@example.comThe output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.
Command breakdown
01eximCommandRuns the exim stage of this one-liner.
02-btOptionConfigures exim with the -bt option.
03user@example.comArgumentPasses user@example.com to exim.
Example input
exim -bt user@example.com
Example output
user@example.com
router = dnslookup, transport = remote_smtp
host mx.example.com [192.0.2.25] MX=10
Illustrative output — exact values vary by system and data.
Official sources