On Fri, 22 Oct 2010, John Jasen wrote:

> Would fetchmail fit the bill?

not well. It works fairly well for a small number of mailboxes, but it 
doesn't scale well.

The last time I had a similar problem (a few years ago), I setup mailboxes 
elsewher e(at fastmail.fm that time) and then used imapsync to pull the 
mail down to the local mailstore. using fetchmail to then deliver it to 
the SMTP server so that it goes through the filtering mechansims that are 
in place would be one step better, but these are significantly more clumsy 
to use than the UUCP approach was. With the UUCP approach my users didn't 
care that they had intermittent network access, (I used diald to bring 
up the outbound connection whenever anyone needed it) the only symptom 
that they could see is that sometimes e-mail took a bit longer to arrive.

This was a lot more work to setup, and so now that I'm out of crisis mode 
(but still thinking about it), I want to figure out how to best handle 
this in the future and document it so that I just have to do it rather 
than figure it out when things break in the future :-)

I would expect that this would be useful for other people who are in areas 
where they have less than reliable data connections (people running on 
generator power, or with expensive per-minute satellite connections say on 
ships, etc)

David Lang


> [email protected] wrote:
>
>> On Fri, 22 Oct 2010, Nathan Hruby wrote:
>>
>>> On Fri, Oct 22, 2010 at 4:36 PM,  <[email protected]> wrote:
>>>> I just suffered an outage to my home Inernet server that looked like
>> it
>>>> was going to last for a week or so, and started to scramble to
>> figure out
>>>> how to set something up so that my home mail server (which could
>> reach the
>>>> Internet via a cell card) could receive e-mail. The phone company
>>>> surprised me by showing up thursday when they scheduled for
>> saturday, so
>>>> the issue became less pressing, but I want to get this figured out
>> and
>>>> documented for the next time I have an issue.
>>>>
>>>> Several years ago I setup a non-profit with a dial-up internet
>> connection
>>>> and had the e-mail server connect out via UUCP to a server with
>> full-time
>>>> connectivity for the e-mail delivery, and that worked well.
>>>>
>>>> so can anyone point me at a document for how to configure inbound
>> e-mail
>>>> connectivity to a site that has intermittent Internet access from
>>>> unpredictable addresses? Is there a better way to do this than the
>> UUCP
>>>> approach I used in the past?
>>>
>>> Sounds like you want a Backup MX service:
>>>
>>> http://www.dyndns.com/services/mailhop/backupmx.html
>>
>> not really, while that will let me ride out an outage (as long as it's
>> less than 10 days), it won't let me rig up temporary network access and
>>
>> process my mail.
>>
>> With my home outage, I was able to reconfigure my firewall to route
>> through a laptop with a Sprint Cell card to get out to the Internet,
>> but
>> that connection is going to be intermittent and I may get a different
>> Ip
>> address each time I connect out. So I can't redirect my MX record to
>> point
>> at it, but I could connect out through this connection and connect to a
>>
>> mail server and pull messages from it.
>>
>> This is what I referred to doing in the past, the Internet connected
>> mail
>> server was the MX destination, but then I would connect to it via UUCP
>> every hour or so and pull down all pending mail and process it
>> normally.
>>
>> David Lang
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