On Thu, May 14, 2009 2:20 pm, Esteban Torres Rodriguez said: > I have problem with some user. This user's sometimes receive email: > > A message that you send could not be delivered to one or more of its > recipients......... > > And Sometimes send email correct. No problem!!!! > > How to control thats?
Are the bounce messages he receives a result of messages he has sent via your server? If so, he may be the victim of backscatter. http://www.postfix.org/BACKSCATTER_README.html If not, we need to see the corresponding Postfix log (or in worst case the bounce message) and your configuration as requested in the list introduction message. -- Magnus Bäck mag...@dsek.lth.se