Am 30.04.2013 14:38, schrieb Matyas Koszik: > > > On Tue, 30 Apr 2013, [utf-8] ĐаНоŃиК ХОНдаŃОв wrote: > >> Hello again, >> many thanks for discussing the security/abuse problems with autoresponder. >> Will it be a good solution to use sender's SMTP-server for response? Of >> course, i understand that this can't prevent false responses inside mail >> domains based on one SMTP server. > You could just give a '550 Yes, your ipv6 works!' error message for every > incoming message. That way you're not sending anything anywere, pushing > the responsbility of generating a bounce back to the sender MTA, which > should already have authenticated the sender properly. This is similar to > your idea, but allows greater flexibility. > This would be the best solution - otherwise someone will eventually abuse your service.
You could give additional infos - and you'll the the complete header returned, too... Philipp
