Thank you everyone. Your advises has been very useful to resolve this issue.
On Sat, Mar 22, 2014 at 2:17 PM, Wietse Venema <wie...@porcupine.org> wrote: > Pau Peris: > > Thanks for the explanation but i think i'm not understanding you. I > > understand MX records are not mandatory but i'm wondering what am i > > supposed to do when someone tries to send an email and the from address > is > > not valid but an A or CNAME RR exists? > > This is described in RFC 5321 section 5.1. > > > Wietse >
