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Update postfix config when hostname is changed #1392
After changing the hostname via the WebUI, the file
This should be considered silent failure, since users will simply stop receiving notifications. The only ways for users to detect that a problem exists is by either sending a test email from the WebUI, or accessing the root account from a shell and checking its mail spool (postfix returns the undeliverable mail).
Removing and re-adding the email configuration in the Rockstor WebUI correctly updates the postfix config.