Re: Apple Mail setting ?



In article <uce-10DDBF.15345210022008@xxxxxxxxxxxxxxxxxxxxxxxx>,
Gregory Weston <uce@xxxxxxxxxx> wrote:

In article
<alpine.OSX.1.00.0802101109540.93076@xxxxxxxxxxxxxxxxxxxxxxx>,
Jeffrey Goldberg <nobody@xxxxxxxxxxxx> wrote:

In <uce-260DA7.21340409022008@xxxxxxxxxxxxxxxxxxxxxxxx>, Gregory Weston
wrote:

I've found recently that an increasing number of providers are blocking
outgoing connections to port 25

And for very good reasons.

Arguably. Unfortunately, until and unless all running mail servers
support connections to alternate ports, it's a potentially major problem
for legit users. IMO it's up to the server administrator to allow or
deny connections to their machine, not my ISP to not let me even try.

Comcast decide to block outgoing to connections to port 25 for me
without any warning a few weeks ago. Everything was fine Sunday night.
Monday morning, we couldn't send mail. The time I spent sorting through
the contradictory, irrelevant and nonsensical answers I got that day
trying to finding out what had happened and why effectively doubled the
cost of my internet service for the year.

Comcast normally sends an email explaining that they've blocked port 25
on your modem, and how to reconfigure your mail client.

They might only send it to the primary account. Have you checked that
account's mail?


and switching their own mail servers to
an authenticated connection on 587. If you happen to use a 3rd-party
server that only accepts connections on 25, you seem to be up a creek.

Are there any email providers out there that insist on port 25 for
submission? If so, they really shouldn't be in the email business at all.

I'm not necessarily talking about companies that are "in the email
business." There are in-house corporate mail servers that don't accept
alternate connections. Should they be upgraded or reconfigured so they
do? Probably. But they haven't been yet.

If you're not on the corporate network, you probably don't need to use
that mail server -- you can send your mail via your ISP's server.

Also, many organizations these days require employees to use a VPN to
access in-house servers. When using the VPN, port blocks on the modem
are irrelevant (unless the modem blocks the ports used to implement the
VPN itself, which is a different issue).

--
Barry Margolin, barmar@xxxxxxxxxxxx
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***
.



Relevant Pages

  • Re: network programming: how does s.accept() work?
    ... The program you contact at Google is a server. ... so, the server will usually assign a new port, say 56399, specifically ... connections to a server remain on the same port, ... sockets is what identifies them. ...
    (comp.lang.python)
  • Nimda.E/unknown memory resident, internet-aware processes
    ... a client's NT 4.0 server was infected with what appeared to be ... network traffic and saw several suspect connections. ... one other connection to port 2787. ... along with about 500 other compromised systems on just that one IRC server. ...
    (Incidents)
  • Re: iptables newbie question
    ... so it's not a dedicated server. ... > merely want to limit connections on that port ONLY to the e-mail server ... do you want to be able to establish connections out to ... The same sort of thing happens for any request you make - dns, ntp, web, ...
    (comp.os.linux.security)
  • Re: Sun Volume Manager or Solaris Disk Suite
    ... keyboard or mouse connections. ... I have to buy a RJ45 cable that will connect to a DB9 adapter on one ... port). ... How would putty know that I am trying to connect to a server via a com ...
    (comp.sys.sun.admin)
  • Re: Port Forwarding -- Checking to be sure I understand it
    ... They run an ssh ... server and VNC service. ... If you want to run the tunnel over some port other than 22 (the ... restrictive firewalls that deny all incoming connections and block most ...
    (comp.security.ssh)