Just to share with everyone (in case somebody see this problem in the future), it seems to be fixed after I added this to main.cf: mailbox_command = /usr/bin/maildrop -d ${USER}
After that all messages went through. BR - Rafael ----- Mensagem original ----- De: "Rafael Azevedo" <raf...@iagente.com.br> Para: "Postfix users" <postfix-users@postfix.org> Enviadas: Quinta-feira, 17 de Janeiro de 2013 8:52:06 Assunto: Messages stucked in maildrop folder Hi Guys, I noticed that a specific SMTP has lots of files on maildrop folder, and I dont know why postfix is not sending theses messages neither to its destination or back to sender. I tried reading this document (http://www.postfix.org/MAILDROP_README.html) but could not understand how to fix this. Any help would be very appreciated. Thanks in advance. - Rafael