Allegedly, on or about 09 April 2015, Rick Stevens sent:
Many ISPs block SMTP traffic TO their end users. Most also block
outgoing SMTP traffic FROM their end users _unless_ it's going to the
ISP's mail servers (this is to prevent end users from becoming spam
farms). Assuming your ISP permits bi-directional SMTP traffic, here
are things to look at:
And many other ISPs (i.e. not your own) may refuse to send mail through
to client IP addresses.
Your ISP has a range of addresses, some of them are allocated to their
own services, the majority are allocated to their customers. There may
be a split of serving-allowed business IPs and serving-disallowed
general customer IPs. The customer range of addresses may be
blacklisted, world-wide (which may be just precautionary, or it could be
in response to prior spam from those IP - in which case you will have
difficulties in reversing such actions).
--
[tim@localhost ~]$ uname -rsvp
Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64
All mail to my mailbox is automatically deleted, there is no point
trying to privately email me, I will only read messages posted to the
public lists.
George Orwell's '1984' was supposed to be a warning against tyranny, not
a set of instructions for supposedly democratic governments.
ZNQR LBH YBBX