Re: avoiding overload on port 587
- Am 01.12.2012 12:24, schrieb Reindl Harald:
>however postfix is widly used on virtual guests
> Am 01.12.2012 03:03, schrieb Stan Hoeppner:
>> On 11/30/2012 5:24 PM, Reindl Harald wrote:
>>> Am 01.12.2012 00:19, schrieb Stan Hoeppner:
>>>> In the real world most road warriors use POP, not IMAP, and those with
>>>> consistent connectivity that do make use of IMAP do it via web mail. So
>>>> the "sent items" folder isn't an issue. Note the OP mentioned "laptop
>>>> users" as his submitters, not desktop users. "Laptop" implies roaming,
>>>> or he'd have used a different descriptive term.
>>> in the real world THESE DAYS especially road warriors use IMAP
>>> and not POP3! notebook, workstation, tablet, smartphone
>> Germany is not the U.S., and neither are Czechoslovakia. The preferred
>> protocol is dictated by availability of connectivity.
> WTF has the protocol with connectivity to do?
> each MUA can download messages so even if you are offline
> you have access to your mails like they would have been
> downloaded via POP3
> the main difference is that you need not to bother which
> client has which messages and where are which maybe
> imprtant sent messages
it sometimes make more sense have real machines
specially with high loads etc, everything is ok
if calculate benefits from both setups before start, for my taste i
preffer real machines with mail
MfG Robert Schetterer
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- On Tue, Dec 04, 2012 at 07:46:10AM -0600, /dev/rob0 wrote:
> On Tue, Dec 04, 2012 at 11:59:01PM +1300, Peter wrote:Or better yet: replace it with postscreen.
> > I would still also set up port 587 on the mail.example.com
> > IP as submission as well and try to encourage your users (at
> > least the ones you can) to use port 587 from now on.
> What I would do, on Linux with IPv4 only, is create the submission
> port and use an iptables redirect for the alternate IP address:
> # iptables -vt nat -A PREROUTING -p tcp --dport smtp -d \
> mail.example.com -j REDIRECT --to-port submission
> This saves the overhead (system and administrative) of running
> another smtpd on [mail.example.com]:25; he can leave his "smtp ...
> smtpd" service alone in master.cf.
> I should also add as a reply to Stan in the other subthread: lookTo clarify, I meant that if those Outlook Expresses are not yet
> above at the first quoted paragraph: "Outlook Expresses setup with
> ... default configuration."
> Yikes, bad news, very bad. If not doing content filtering nor
> policy limitation of submission now, he will be soon. And possibly
> losing his job in any case. Tomas is not in a good place right now.
compromised by malware, they will be, soon.
http://rob0.nodns4.us/ -- system administration and consulting
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