Karol Augustin <ka...@augustin.pl> writes: > On 2018-01-30 16:44, Ghislain Adnet wrote: >> hi, >> >> We participated in some police enquiries about emails sent to >> blackmail people and get the source IP. The ISP answered >> that they use proxy systems and they requires IP+port to be able to >> track the source. We just helped the case but it >> sparkle the idea that i better start to log the tcp port as well on >> my servers logs. >> >> >> In postfix the IP is logged but not the TCP port. To be ahead in >> future legal issues i wanted to know if there is a way >> to
Unless you are required by law to log additional information, it is generally better to log as little information as necessary.