On 2017-03-20, Peter Leeman <[email protected]> wrote: > Hi All > > Is it possible to block an email if both the sender and recipient domain are > the same? > Example - [email protected]<mailto:[email protected]> to > [email protected]<mailto:[email protected]>
sure it's possible, I'm not a common solution though. > The reason I am looking to do this is we are going to be using Exim > to handle incoming/outgoing mail for a domain hosted on Exchange so > any mail for domain-a.com being emailed from a mailbox on domain-a.com > will never leave exchange. We still want a sender on domain-a.com to > be able to email external domains, but want to prevent incoming emails > destined for domain-a.com appearing as if they are coming from > domain-a.com. Publish an SPF record for domain-a.com, whitelist the exchange server in exim and turn on SPF enforcement. this has the advantage of sharing your rule with the rest of the internet. -- This email has not been checked by half-arsed antivirus software -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
