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Update check (#1951)

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* mail binary

* initial work

* make env vars available

* typo

* some fixes

* make script ugly, to satisfy linter..

* mailserver.env updated

* Version to welcome message added

* remove VERSION file references

* VERSION --> DMS_VERSION

* fetch remote version

* variable usage

* Quoting added

* edge test & docu

* dash removed

* subject changed

* re-add VERSION

* VERSION added

* new file:   VERSION

* rewrite

* unnecessary additions from fail2ban PR removed

* UPDATE_CHECK_INTERVAL added

* syntax check & _log function

* comment added

* final commit
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Casper 2021-05-19 21:18:06 +02:00 • committed by GitHub
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docs/content/config/environment.md
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@ -193,6 +193,19 @@ Set the message size limit for all users. If set to zero, the size will be unlim
- **empty** => postmaster@domain.com
- => Specify the postmaster address
##### ENABLE_UPDATE_CHECK
Check for updates on container start and then once a day. If an update is available, a mail is send to POSTMASTER_ADDRESS.
- 0 => Update check disabled
- **1** => Update check enabled
##### UPDATE_CHECK_INTERVAL
Customize the update check interval. Number + Suffix. Suffix must be 's' for seconds, 'm' for minutes, 'h' for hours or 'd' for days.
- **1d** => Check for updates once a day
##### POSTSCREEN_ACTION
- **enforce** => Allow other tests to complete. Reject attempts to deliver mail with a 550 SMTP reply, and log the helo/sender/recipient information. Repeat this test the next time the client connects.