How can I change the retransmission time in Postfix?

Email marketer from ServerFault answers that you can tune Postfix retry settings by adjusting `minimal_backoff_time` (default: 100s), `maximal_backoff_time` (default: 4000s), and `queue_run_delay` (default: 300s). He suggests experimenting with these values based on your specific needs, such as reducing the delay for local network issues.

Marketer from Email Geeks shares that you can set the retransmission time in Postfix by modifying the `transport_retry_time` setting in the `main.cf` file. The default time unit is seconds, but can be set in seconds (s), minutes (m), hours (h), days (d), weeks (w).

Email marketer from DigitalOcean explains that to modify the retry intervals, you need to edit the `main.cf` file, typically located in `/etc/postfix`. You can adjust parameters like `minimal_backoff_time` and `maximal_backoff_time` to influence how frequently Postfix retries sending emails.

Email marketer from Reddit explains that the parameters `minimal_backoff_time`, `maximal_backoff_time`, and `queue_run_delay` control Postfix's retry behavior. The backoff times determine the range of time to wait between retries, and the queue run delay specifies how often Postfix scans the queue for deferred messages.

Email marketer from Super User shares that you can adjust parameters such as `queue_run_delay`, `minimal_backoff_time`, and `maximal_backoff_time`. By configuring these, you can influence how often Postfix attempts to resend the email and the range of the retry intervals.

Email marketer from OpenStack documentation shares that in the context of OpenStack, if you are experiencing delays in email delivery, you can adjust Postfix's `queue_run_delay` parameter in the `/etc/postfix/main.cf` file to control how frequently the queue is processed.

Email marketer from LinuxQuestions.org explains you can change the retry time by setting `queue_run_delay`, `minimal_backoff_time` and `maximal_backoff_time` in main.cf. Decreasing `queue_run_delay` makes Postfix retry more often. The backoff times control the range of delays for retries.

Email marketer from Stack Overflow explains that you can modify the `minimal_backoff_time` and `maximal_backoff_time` parameters in Postfix's main.cf file to control the retry interval for deferred messages. These settings define the initial and maximum delay Postfix will use when retrying delivery.

Email marketer from Plesk forum explains that the default settings for retry intervals in Postfix are often sufficient, but if you need faster retries, you might consider lowering the `queue_run_delay` and `minimal_backoff_time` parameters. Always test your changes to ensure you do not overload the server.

Email marketer from Unix & Linux Stack Exchange suggests if the goal is to immediately retry after greylisting, adjusting Postfix alone might not be sufficient. Instead, explore methods for handling greylisting more gracefully such as whitelisting or integrating with a greylisting daemon to manage retry attempts.

Expert from Word to the Wise explains that when tuning Postfix, it is important to understand the effect of parameters such as `minimal_backoff_time`, `maximal_backoff_time`, and `queue_run_delay`. Understanding how these work together is key to optimizing delivery.

Documentation from Postfix.org explains that the `transport_retry_time` parameter specifies the time between attempts by the Postfix queue manager to contact a malfunctioning message delivery transport. Time units can be specified in seconds (s), minutes (m), hours (h), days (d), or weeks (w). The default is 60s.

Documentation from Postfix.org details that the parameter `delay_warning_time` determines when Postfix will send a warning message to the sender about a delayed email. This is not a retry setting, but it is related to the email's delivery status and can be helpful for monitoring delivery issues.

Documentation from Postfix.org explains that `queue_run_delay` specifies the time between deferred queue scans. Lowering this value will cause Postfix to retry failed deliveries more frequently, but may increase system load.

Documentation from Postfix.org details that to adjust the time Postfix waits before retrying a failed delivery, you should configure the `minimal_backoff_time`, `maximal_backoff_time`, and `queue_run_delay` parameters within the `main.cf` configuration file.