Hello there, I’m running Postfix and have configured a custom content filter on localhost ( a python service that listens at 10025 ). When sending large messages, Postfix rejects them with the following error:
message size 34639078 exceeds size limit 33554432 of server localhost[127.0.0.1] >From what I can tell, the limit is being enforced by the Postfix content filter (the localhost smtpd service). My global message_size_limit in main.cf is already higher, but the content filter listener seems to have its own setting at 33 MB (33554432). Could someone please guide me on the correct steps to raise this limit? Specifically: - Do I need to adjust the master.cf entry for the localhost smtpd (e.g. -o message_size_limit=...)? - Are there any additional changes needed in the content filter to accept larger messages? - Any best practices for keeping the limits consistent across Postfix and the filter? My goal is to allow up to ~100 MB messages for outbound mail. Thanks in advance for your help!
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