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label.aria.caretdown"delivery temporarily suspended: unknown mail transport error"
Postfix will try to connect, fail, and generate the "unknown mail transport error." actionable fix. And once resolved
By methodically isolating the transport—whether Dovecot, Amavis, Maildrop, or a custom script—you can convert the "unknown" into a known, actionable fix. And once resolved, safeguard your configuration to ensure that the next system update doesn’t leave your mail queue suspended once again. actionable fix. And once resolved
: The Postfix service needs specific ownership and read/write permissions for its queue files and lookup tables (like sasl_passwd ) to function. actionable fix. And once resolved