Let me start off with a rather dumb question. Why can't these six servers be configured to use the 7th as a smarthost. The seventh (out going smtp) would restrict incoming connections to the ips of these 6 servers. Add the ip of the 7th to the spf dns record for each of the domains and you are good to go. I do this on occasion except i add one more layer for security. I create a vpn between my servers and the smarthost. The smarthost listens only on the private vpn interface and forwards via the public ip.
Bharath Eric Shubert <[email protected]> wrote: >On 09/26/2013 06:25 PM, Fernando Endangan wrote: >> Dear Everyone, >> >> Has anyone tried setting up a separate SMTP server to manage outgoing >> traffic. >> >> Let me draw this in your mind. I currently have 6 mail servers with >300 >> domains hosted on each server averaging 20 email accounts per domain >and >> using qmail but experiencing high queue due to outgoing smtp >connection >> (no spams) all emails are legitimate. Majority of our clients are >> freight forwarders, remittance, multimedia company, etc. Basically, >> everyone maximizes the use of their email including attachments, >> marketing ads, and several mail activity. What I am thinking is to >setup >> a separate SMTP where all my 6 mail servers connect to send only >> messages and not receive. >> >> Is my setup possible? Anyone kind enough to provide documentation of >my >> stated dilemma? I would appreciate any kind response from you qmail >> experts. >> >> Thanks in advance. >> >> --------------------------------------------------------------------- > >That's quite a good idea actually. My intention for the future of QMT >is >to make separate role-oriented servers such as this (a submission >server), which will be easily combined with others to make up what we >presently know as QMT. > >In order to do this, simply build a new (virtual) qmt host. You can >omit >the packages you won't be needing such as squirrelmail, courier, >maildrop, etc. > >Once you have the server built, modify the >/home/vpopmail/etc/vpopmail.mysql file to point to the host with your >mysql database, and ... oops. You have 6 of these, don't you? So it's >not going to be quite so easy. > >I'm thinking that you might want to set up a vpopmail/mysql database on > >the submission server which contains account information for all of the > >domains. You might be able to use mysql's replication feature to make >this database a secondary to all 6 of your existing vpopmail databases, > >but I don't know if that's possible, or if you might run into any >clashing of keys between the databases. There shouldn't be, but I >haven't looked at that schema in a while. > >I'm going to ask for other opinions at this point. Bharath, you here? >Anyone else have an idea about this? Please chime in. :) > >Interesting project, Fernando. I hope we can help you out with it. > >-- >-Eric 'shubes' > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [email protected] >For additional commands, e-mail: >[email protected] Mobile mail. Apologies for bad formatting and typos.
