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243 launch guides · 2601 reviewed steps
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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.
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caution60 minintermediate8 stepsExim4

Security · Services & Applications

Configure Exim TLS and authenticated message submission

Install a trusted certificate, separate port 587 policy, require encryption before AUTH, integrate an authenticator, rate-limit abuse, and test relay boundaries.
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caution90 minadvanced8 stepsExim

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.
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caution60 minintermediate8 stepsPostfix