RE: [suse-linux-uk-schools] Router IP addresses
-----Original Message----- From: Frank Shute [SMTP:shute@esperance.demon.co.uk] Sent: Thursday, December 21, 2000 12:45 AM To: Schools List Subject: Re: [suse-linux-uk-schools] Router IP addresses
I thought I'd mention that a static IP allows you to have any number of email addresses and you can then pick up your mail via SMTP from Demon and distribute it to your users via POP3 or IMAP. To my mind that's a big benefit of using Demon. The static IP also makes the possibility of remote admin via ssh a relatively easy proposition. [Simon Wood] The real advantage of a static IP is that you can run your own SMTP deamon (visible to the outside world) so that you don't have to rely on Demon to store and forward it to you. In this case people email you directly....
If you do have someone storing/forwarding email for you then you can generally pick it up from either SMTP or POP3. Using an application such as Fetchmail you can pick up emails from a 'unified' (multiple names in a single box) POP3 mail boxes and distribute them to their individual destinations. POP3 generally has the advantage that emails are only deleted once they have been successfully collected, a failure during SMTP collection could result in emails being lost. Simon W.
I thought I'd mention that a static IP allows you to have any number of email addresses and you can then pick up your mail via SMTP from Demon and distribute it to your users via POP3 or IMAP. To my mind that's a big benefit of using Demon. The static IP also makes the possibility of remote admin via ssh a relatively easy proposition. [Simon Wood] The real advantage of a static IP is that you can run your own SMTP deamon (visible >to the outside world) so that you don't have to rely on Demon to store and forward it to >you. In this case people email you directly.... Would James need a permanent connection to do this rather than a dial-up? otherwise mail would be returned if he is not visible to the net.
If you do have someone storing/forwarding email for you then you can generally pick it >up from either SMTP or POP3. Using an application such as Fetchmail you can pick >up emails from a 'unified' (multiple names in a single box) POP3 mail boxes and >distribute them to their individual destinations. This is what we do at school, we run IMAIL on an NT4 server which collects and sends SMTP on a schedule, if the net is not available e.g. we have turned it off during prep, users see no difference to the service, except that they have no fresh mail during that time rather than an unavailable service.
What I would like to do at home is use a POP3 dial-up account (e.g.. Freeserve which allows anything@domain and is free) as though it were SMTP and segregate the mail for different users. Has anyone done this?
POP3 generally has the advantage that emails are only deleted once they have been >successfully collected, a failure during SMTP collection could result in emails being >lost. That's interesting, I had always assumed some form of hand-shaking was taking place.
Kind regards Adrian
Hi, On 21 Dec 2000, at 11:06, Adrian Wells wrote: <snip>
POP3 generally has the advantage that emails are only deleted once they have been successfully collected, a failure during SMTP collection could result in emails being lost.
That's interesting, I had always assumed some form of hand-shaking was taking place.
Yes. I'm not on very knowledgable ground here but I'm pretty sure that an email is only deleted from the mail queue of the sender once receipt of it has been acknowledged by the receiver. As a worst case scenario I think you could have a situation where the email is passed from the sending host to receiving host, and the communication is cut after the receiving host has the entire message, but before the sending host has received acknowledgement that it's been received, so it keeps its copy and will resend it. The timing on this would need to be pretty precise though. I strongly suspect that SMTP is a pretty failsafe method of moving email around. -- Nick Drage - half understanding Pegasus until he gets his Linux partition sorted out......
participants (3)
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Adrian Wells -
Nick Drage -
Simon Wood