So I have Postfix working great and I've always used webmail if I
needed to send email from PC's outside of $mynetworks. So fast forward
to today where I got my 1st Android powered mobile phone and I can
configure the Android mail client to send/receive IMAP email but my
question is do I need to become an open relay to allow my random
wireless providers dynamic range of IP's to send mail via Postfix?
Seems extremely vulnerable and scary to think I would have to allow my
providers IP range to relay mail via my MTA. I started reading a bit
and I think I need SASL authentication (correct me please if I'm
wrong) and since both Postfix 2.8.1 & Dovecot 2.0.11 are configured /
using TLS, is there anything else I would need beyond SASL or that you
recommend for sending email from my Android powered mobile?
