Diego Puertas writes: > Sam wrote: > > > Diego Puertas writes: > > > > > When I put wrong email adresses (i.e.: "|/sbin/mkmess [EMAIL PROTECTED]" , or > > > "//@%^&*|" ) in the mail from command of a qmail server, the server does > > > not protest, as sendmail does. Postfix does the same as qmail. > > > > > > What are the reasons and beneficts of this behaviour? > > > > The server saves about .25 seconds by not issuing an extra DNS lookup. > > > > -- > > Sam > > But, in the case of sendmail, does the server makes a DNS look up or just > check that the adress format is valid? The default sendmail configuration does issue a DNS look up on the sender. Also, most sendmail configurations also validate local recipient addresses. -- Sam
