Re: how to protect MTAs from mass mails

2014-08-20 Thread Larry Stone
On Wed, 20 Aug 2014, ml ml wrote: This setup is not very unusual if you have a lager network. Then you have multiple mailout servers for send/deliver the mails. How could i possibly control recipients that do not belong to me?! You failed to adequately describe the problem. We assumed you were

Re: how to protect MTAs from mass mails

2014-08-20 Thread Wietse Venema
ml ml: > This setup is not very unusual if you have a lager network. Then you > have multiple mailout servers for send/deliver the mails. > How could i possibly control recipients that do not belong to me?! If your MTA is an outbound relay for an internal network, then you could certainly require

Re: how to protect MTAs from mass mails

2014-08-20 Thread ml ml
This setup is not very unusual if you have a lager network. Then you have multiple mailout servers for send/deliver the mails. How could i possibly control recipients that do not belong to me?! This is my config: -- postconf -n alias_database = hash:/etc/aliases alias_maps

Re: how to protect MTAs from mass mails

2014-08-20 Thread L. D. James
Try using the relay_recipient_maps feature which will only accept mails in that list. -- L. James -- L. D. James lja...@apollo3.com www.apollo3.com/~ljames On 08/20/2014 04:56 AM, ml ml wrote: Hello list, from time to time i get hit by mass mail with fake sender addresses. By default my pos

Re: how to protect MTAs from mass mails

2014-08-20 Thread L. D. James
On 08/20/2014 07:44 AM, Daniele Nicolodi wrote: On 20/08/2014 10:56, ml ml wrote: By default my postfix accepted those mails until it found out that the recipent does not exists. Then postfix tries to send back that "550 User Unknown" error mail. I doubt that Postfix by default accepts mail fo

Re: how to protect MTAs from mass mails

2014-08-20 Thread Daniele Nicolodi
On 20/08/2014 10:56, ml ml wrote: > By default my postfix accepted those mails until it found out that the > recipent does not exists. Then postfix tries to send back that "550 > User Unknown" error mail. I doubt that Postfix by default accepts mail for users it does not know about, but anyway...

Re: how to protect MTAs from mass mails

2014-08-20 Thread Larry Stone
On Aug 20, 2014, at 3:56 AM, ml ml wrote: > rom time to time i get hit by mass mail with fake sender addresses. > > By default my postfix accepted those mails until it found out that the > recipent does not exists. Then postfix tries to send back that "550 > User Unknown" error mail. > > Howev