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SMTP server to queue messages for offline users

km_itl
km_itl asked
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Last Modified: 2013-12-27
I am looking to set up and SMTP server on a SUN systemthat can queue all mail sent to a specific domain so as thatanother machine (which will be dialing-in) can connect andcollect all the mail for that domain on a periodic basis. The machine that is calling will have a static ip address,and may call several times a day, but may also go a few days(e.g. weekends) without calling.It would also be a bonus if more than one of these servers(to handle several domains, each going to a different dialupmachine) could be set up on the same unit.Thanks for any help you may be able to offer.Regards,Keith Martin.
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Look into exim as an SMTP server - it has a mechanism for "batching" mail to a given IP address, so the messages would just go into the queue, then when the dialin machine connects it could trigger a delivery run so all mail destined for that host would get delivered. Exim is available from ftp://ftp.cus.cam.ac.uk/pub/software/programs/exim/exim-n.nn.tar.gz, where n.nn is the highest-numbered version in the directory.

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Commented:
henry's answer has to be graded as Excellent as it is exactly what I was looking for. The software specified does both queueing for offline connections and handles virtual domains.
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