OneLinersCommand workbench
Guides
Operational guides

Complete procedures with a way back.

Searchable, versioned procedures with prerequisites, verification, concrete output, and rollback.

Guides
243
Favorites
0
243 launch guides · 2601 reviewed steps
2 of 243 guides

Services & Applications · Networking & DNS

Configure Exim4 to relay outbound mail through a smarthost

Route non-local mail to an authenticated TLS relay, protect credentials, preserve local delivery, rewrite identities deliberately, and test failure behavior.
Save to collectionCreate a collection in the sidebar first.
caution60 minintermediate8 stepsExim4

Services & Applications · Networking & DNS

Configure Postfix to relay outbound mail through a smarthost

Set relayhost, authenticate with a protected map, require verified TLS, scope sender rewriting, preserve local delivery, and test deferral on outage.
Save to collectionCreate a collection in the sidebar first.
caution60 minintermediate8 stepsPostfix