On 11/26/2018 1:34 PM, Roberto Carna wrote: > Hi people, suppose my domain is "company.com <http://company.com>". > > My email users are as this: u...@company.com <mailto:u...@company.com> > > Is normal that I can send a mail from rob...@company.com > <mailto:rob...@company.com> to rob...@company.com > <mailto:rob...@company.com>, from a public IP not belonging to my > company? > > In my case, I am at home and I execute: > > $ telnet smtp.company.com <http://smtp.company.com> 25 > ehlo company.com <http://company.com> > mail from: rob...@company.com <mailto:rob...@company.com> > rcpt to:rob...@company.com <mailto:to%3arob...@company.com> > data > test > . > > and finally the message arrives to may Inbox. > > Because I suppose that the normal behavior is sending mail from > local address just from an internal IP...not from external. > > Thanks a lot, regards!!!
That's perfectly normal. Anyone on the internet can send mail to your company's public mailserver, and the mail from address is not checked with default setup. If you don't like people spoofing the mail from: address, use SPF. -- Noel Jones
