Web Reference: The default_destination_concurrency_limit parameter (default: 10) controls how many messages may be sent to the same destination simultaneously. You can override this setting for specific delivery channels (local, smtp, uucp etc.). The Postfix queue manager implements the analog of the TCP slow start flow control strategy: when delivering to a site, send a small number of messages first, then increase the concurrency as long as all goes well; reduce concurrency in the face of congestion. My client is a travel agency and has thousands of opted-in emails (no spam). Every week they send a message to all customers once, but I'm having problems with some providers and want to rate limit...
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Devops Sysadmins Postfix Concurrency Limit Net Worth 2026: Salary, Income & Wealth Net Worth & Biography
Estimated Worth: $11M - $26M
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Last Updated: April 11, 2026
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