Limit email size

[dayjahone]

How do I limit the size of emails that can be sent?

Thanks.

[till]

In postfix main.cf set:

message_size_limit = 200000000

The number is the max. allowed message size in bytes.

[dayjahone]

That thread doesn't exist in the file. I'm guess that means I have no limit. If I add "message_size_limit = 5000000" to the end of the long list (after "tls_random_source = dev:/dev/urandom"), it will limit emails to 5MB?

Thanks.

[till]

Yes, this should work.

Most likely there is already a limit set at the moment, as postfix uses default values in case a value is not set in main.cf. To get the current limit, run:

postconf | grep message_size_limit

[tensor]

The more elegant way would be

postconf -e message_size_limit=5000000

postconf will add the setting or alter the existing one if it exists