On Tue, Aug 2, 2016 at 2:05 AM, D'Arcy J.M. Cain <da...@vex.net> wrote: >> probably your SMTP server, will tell you. In contrast, your valid >> email address will become the target of many spam emails even if you >> manage to block them. It will also be used as the source of spam so >> somebody at vex.net may be fooled into believing that they are >> receiving a proper email. > > I'm a little insulted that you think that I would ever allow someone to > send mail to Vex.Net pretending to be from Vex.Net. That's just too > easy to detect and block. Try it.
vex.net. 10800 IN TXT "v=spf1 mx -all" vex.net. 10800 IN MX 10 mail.vex.net. mail.vex.net. 10800 IN A 98.158.139.68 So, if you're not sending mail from 98.158.139.68 and you claim to be vex.net, you should be blocked. Unfortunately, a lot of domains don't have SPF records, or have very convoluted ones (check out gmail.com's SPF for instance). ChrisA -- https://mail.python.org/mailman/listinfo/python-list
