[vchkpw] OFF-TOPIC: A good POP3/SMTP Proxy Server
Hi guys, this question is not related to vpopmail, but since there are a lot of wise people here, let me ask this. (and maybe some people would benefit from this thread too) Does someone out there know if there is a good POP3/SMTP proxy server implementing the following feature: - It doesn't let the local SMTP/POP3 traffic to cross the dial-up/internet link. I'll explain bellow what I mean with that: Suppose I have a qmail+vpopmail mail server in my headquarter office in New York, being the MX0 for the domain newyork.com. In that office I have, say, 200 e-mail accounts @newyork.com. But in Allentown-PA, I have a big office, with 150 people using e-mails @newyork.com. Since their internet link is very slow, I don't want they using the mailserver in New York whenever an employee at Allentown send an e-mail for other employee in Allentown. Instead, I want a POP3 proxy server integrated with SMTP, that could prevent the messages internal to Allentown to cross the internet link. I'd like the proxy server to keep the local messages right there in Allentown. Does someone know a product like that? Thank you, - Bruno Negrao - Network Manager Engepel Teleinformática. 55-31-34812311 Belo Horizonte, MG, Brazil
Re: [vchkpw] OFF-TOPIC: A good POP3/SMTP Proxy Server
On Oct 25, 2005, at 5:55 AM, Bruno Negrao wrote: Instead, I want a POP3 proxy server integrated with SMTP, that could prevent the messages internal to Allentown to cross the internet link. I'd like the proxy server to keep the local messages right there in Allentown. Does someone know a product like that? There have been past conversations on the list about doing that with vpopmail on both ends. Here's the general gist: Location A has their POP mailboxes, and aliases to forward mail for users at location B to [EMAIL PROTECTED] Location B has their POP mailboxes, and aliases to forward mail for users at location A to [EMAIL PROTECTED] Both servers have domain.com in their rcpthosts, virtualdomains and users/assign files. Location A has loca.domain.com as an alias domain, and Location B has locb.domain.com as an alias domain (to domain.com). Users configure their email client to pick up mail as [EMAIL PROTECTED], but use [EMAIL PROTECTED] as their email address in the From header. In your case, you'd keep New York as your MX 0, and it would forward mail to Allentown as needed. People at the Allentown office who sent mail to each other, would have their mail stay on their local (locb) server. Mail to New York and any other Internet location will be quickly queued on the locb server. You might even be able to configure traffic priority on your dialup link to throttle smtp traffic over the dialup link to give preference to http (and other) traffic. -- Tom Collins - [EMAIL PROTECTED] QmailAdmin: http://qmailadmin.sf.net/ Vpopmail: http://vpopmail.sf.net/ You don't need a laptop to troubleshoot high-speed Internet: sniffter.com
[vchkpw] validate from
Hello list gurus: How can I do that with smtp auth qmail validates that the from must be the same that the auth user? the idea is to avoid some user [EMAIL PROTECTED] can impersonate another user and send mails with another from: [EMAIL PROTECTED], I only want to admit him to send emails with from: [EMAIL PROTECTED], being domain.com a local domain. is that possible? regards, Ingo.
Re: [vchkpw] validate from
On Oct 25, 2005, at 8:35 AM, Ingo Claro wrote: How can I do that with smtp auth qmail validates that the from must be the same that the auth user? the idea is to avoid some user [EMAIL PROTECTED] can impersonate another user and send mails with another from: [EMAIL PROTECTED], I only want to admit him to send emails with from: [EMAIL PROTECTED], being domain.com a local domain. No current way to do it. Note though, that if smith pretends to be jones, his name will appear in the Received: headers of the message. If you try to force the SMTP AUTH username to be the same as the MAIL FROM, then smith can just send his forged e-mail from another server. -- Tom Collins - [EMAIL PROTECTED] QmailAdmin: http://qmailadmin.sf.net/ Vpopmail: http://vpopmail.sf.net/ You don't need a laptop to troubleshoot high-speed Internet: sniffter.com
