Postfix That Only Sends, And Only Encrypted
Postfix as a send-only relay: no local delivery (a stock install spools root's mail on the box), one smarthost, TLS required rather than opportunistic, SASL credentials in a root-only lmdb map, local recipients rewritten to a real mailbox. Original role, live-tested on Rocky Linux 10.
Verification
Live-testedReally deployed to a container sandbox, proven idempotent (a second run changes nothing), verified against the role’s assertions, then torn down.
Conformance
- Static validation (yamllint · ansible-lint)
Provenance
- SHA-256 checksum
- Signature (pending)
Functional
- Live-tested - applied, verified, destroyed
Last verified 2026-09-19 · podman 4.9.3 · ansible 2.21.4 · how we verify
Cite it in your README
badge · attributionPaste this beside the module in the repository that uses it. The badge is rendered from this artifact's verification record, so it reads live-tested because the record says so, and the link lands on this page.
[](https://www.iac-bazaar.com/catalog/ansible-postfix-null-client?utm_source=syndication&utm_medium=readme&utm_campaign=artifact)
Ansible role 1.0.0, live-tested on IaC Bazaar: [Postfix That Only Sends, And Only Encrypted](https://www.iac-bazaar.com/catalog/ansible-postfix-null-client?utm_source=syndication&utm_medium=readme&utm_campaign=artifact)
```yaml
# Postfix That Only Sends, And Only Encrypted: https://www.iac-bazaar.com/catalog/ansible-postfix-null-client (download from your IaC Bazaar account)
```Preview:
Documentation
postfix-null-client
Postfix as a send-only relay: nothing is delivered on the machine, everything goes to one smarthost, TLS is required, and the smarthost credentials are in a root-only map. Original role for EL 9 and 10, live-tested with podman on Rocky Linux 10.
A stock Postfix keeps your mail and sends in clear. Out of the box
mydestination includes the host's own name, so mail for root@thishost -
every cron failure, every local alert - is delivered into /var/spool/mail on
the box, where nobody reads it. relayhost is empty, so everything else is
sent straight to the destination's MX from the host's own address, which most
receivers rate as spam. And smtp_tls_security_level = may sends in clear
whenever the other side does not offer TLS. This role empties mydestination,
sets local_transport to an error so local delivery is refused rather than
spooled, points relayhost at your smarthost and sets the TLS level to
encrypt, which refuses to send unencrypted.
Local recipients can be rewritten. Set postfix_null_client_root_alias and
root, root@thishost and postmaster are rewritten to that mailbox before
relaying, so a cron failure reaches a person. Leave it empty and such mail
bounces, which is at least visible.
Credentials stay with root. The SASL map is written 0600 and rebuilt with
postmap only when it changes; the role never logs its contents. The maps are
lmdb:, not hash: - Enterprise Linux 9 and 10 build Postfix without Berkeley
DB, and hash: there is "unsupported dictionary type", which the live test
found on the first run.
License
Commercial - IaC Bazaar EULA. (c) IaC Bazaar.
Usage code & full reference need an account
The complete copy-paste usage, the full input/output reference, and operational notes are free with an account - shown here and bundled in the download. Sign in and this section fills in.
- Variables
- Test
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