mail solution to meet management and ISP requirements

idotokama · 03-01-2009, 12:45 AM

We have a linux mail server at our office (postfix / dovecot / squirrel mail) and currently we are doing simple scanning using ClamAV and SA.

Now the ISP has convinced the management that their hosted scanning solution is better and so the management wants to go with that.

However the problem is ISPs service is not only scanning and it come with 10MB of individual mailboxes (can use pop3, smtp and imap4 with that). However that size is not enough for us and going for mailboxes with more space is very costly.

So we want to use the ISP scanning with our mail server. Sending outgoing mail directly from our server is not a problem. But I need your advice in getting mails directly from ISPs individual boxes to our mail server.

Thanks in advance.

billymayday · 03-01-2009, 01:14 AM

Look into "fetchmail"

rtspitz · 03-01-2009, 02:04 AM

Since when do managers know about technology ?
Should managers have time to think about SPAM filters ?

How about fetchmail ?

Quote:

fetchmail is a mail-retrieval and forwarding utility; it fetches mail from remote mailservers and forwards it to your
local (client) machine's delivery system. You can then handle the retrieved mail using normal mail user agents such as
mutt(1), elm(1) or Mail(1). The fetchmail utility can be run in a daemon mode to repeatedly poll one or more systems at a
specified interval.

The fetchmail program can gather mail from servers supporting any of the common mail-retrieval protocols: POP2 (legacy, to
be removed from future release), POP3, IMAP2bis, IMAP4, and IMAP4rev1. It can also use the ESMTP ETRN extension and ODMR.
(The RFCs describing all these protocols are listed at the end of this manual page.)

[fetchmailrc; minimal configuration]

Code:

server your.isp.com
proto imap
user joe
password joes.pw
ssl # use ssl
keep # this keeps retrieved mails on the server
to joe # local linux user

server your.isp.com
proto imap
user bart
password barts.pw
ssl # use ssl
keep # this keeps retrieved mails on the server
to bart # local linux user

Also be sure to check the 'fetchall' parameter which will not work with 'keep'. It's easy to mess up your mailbox if fetchmail retrieves all the stuff and the config is not quite right, therefore the 'keep'.