On Thu, Mar 24, 2022 at 11:31:12AM -0300, Leandro Santiago wrote: > Maybe this is a limitation in the smtp logging and not on header_checks?
Correct. > Any clues of where such limit might be configured https://github.com/vdukhovni/postfix/blob/master/postfix/src/smtp/smtp_proto.c#L1140-L1155 > and how I can change it? The limit is not configurable. To record message headers in detail, you'll need to do on input via a milter or content_filter. On output, your choices are more limited. -- Viktor.