Re: Mail Server Accused of Spam!

2014-03-16 Thread Thomas Harold
On 3/15/2014 6:08 AM, Tim Smith wrote: > Hello, > > I have a few users who just want their email forwarded onto GMail > Accounts however these users seem to receive an inordinate amount of > spam and so I get a message from Google in my logs stating: > We refused to do it after a few years. If

Re: Would somebody let me know what I need to do to improve this setup.

2013-08-07 Thread Thomas Harold
On 8/7/2013 7:09 AM, Mikael Bak wrote: I don't recall email being the only alternative to public cloud file storage solutions. Set up a file server of you own and keep copyrights in house. 32GB sized email messages is a mistake IMO. Or implement a version control system (such as subversion)

Re: /etc/passwd Centos + postfix

2013-06-25 Thread Thomas Harold
On 6/25/2013 8:31 AM, Dejan Doder wrote: yes I know that , but how users will change passwords by themselves ? Long-term, I recommend moving away from local users and towards virtual users with the accounts stored in a SQL database. Which lets you use things like PostfixAdmin or other databa

Re: Best way to handle a Delivered-To exploit??

2013-06-21 Thread Thomas Harold
On 11/6/2012 12:08 AM, David Rees wrote: On Sun, Nov 4, 2012 at 6:45 PM, Brian Schang wrote: In the past week, my server has accepted dozens of emails that were not deliverable. In all cases the issue has been a mail forwarding loop which resulted in the email bouncing. Given that my configurat

Re: Is this an attack?

2013-06-20 Thread Thomas Harold
On 6/20/2013 6:49 AM, Andreas Kasenides wrote: My conclusion is that the harvester is blindly picking usernames and domains from wherever it can (possibly from compromised systems but also from clear text net traffic) and pairing them at random!! I guarantee that they are pairing them at rand

Re: Automating regular checks that incoming & outgoing mails are still working

2011-08-23 Thread Thomas Harold
On 8/21/2011 10:03 AM, Roger Goh wrote: There's often problem with our postfix mail server (that runs Cyrus / Cyrus-imapd) : I have scripts (using mutt) to send hourly mails out (& from another postfix server, I can send mails to it). I need a way / method such that if those hourly test mails

Re: anti spam measures

2010-01-05 Thread Thomas Harold
On 1/4/2010 5:40 PM, Roman Gelfand wrote: Well, it looks like, perhaps, I found the missing link. After adding s25r rules and HELO response verification in main.cf, no spam has siped through. I think that mostly it was HELO response verification that did it. BTW, is there a reason not block ema

Re: Virtual domains, virtual mailboxes and catch-all

2009-12-24 Thread Thomas Harold
On 12/23/2009 9:05 PM, Ralph Johnston wrote: I am moving our email system to Postfix, but I'm not quite able to get it to do what I want. I would like to "collapse" (alias?) all our domains and subdomains down to one, so email to a name @ any of our domains ends up in one mailbox. I have this wo

Re: OT: Postfix & ClamAV integration

2009-12-17 Thread Thomas Harold
On 12/17/2009 8:18 AM, JORGE CARMINATI wrote: Hi all! I'm trying to integrate Postfix (chrooted) with ClamAV and am looking for some information about this. It seems that the old fashioned style of configuring Postfix + amavisd-new now days is not recommended (performance) and that the best avail

Re: Bounce at SMTPD level

2009-12-10 Thread Thomas Harold
On 12/10/2009 8:09 PM, Marty Anstey wrote: Rejecting messages inline is a far better solution than generating a bounce or simply dropping the message. Most, if not all spam has a forged sender so generating a bounce is a very bad idea. Rejecting inline is much better than dropping message; at le

Re: Block mail sent from outside with own domain name

2009-12-02 Thread Thomas Harold
On 12/2/2009 10:17 AM, Stähelin, Simon wrote: Is it possible (and how) to block emails sent via an outside smtp server (not mynetworks) with our domain? Three methods come to mind... 1) Publish restrictive SPF rules for your domain, then add a check_policy_service that uses one of the SPF p

Re: OT: need some advice as to distro

2009-12-01 Thread Thomas Harold
On 12/1/2009 9:09 AM, John wrote: Fedora - a little too dynamic for use as a server. This is to be expected as it is a development system which I don't think is aimed at a production like environment, plus the latest release seems very desktop oriented. FC supposedly changes too much. I might

Re: A question about Postfix and virus scanning

2009-11-30 Thread Thomas Harold
On 11/30/2009 3:11 AM, Ali Majdzadeh wrote: Stan, Hi Thanks for your detailed response. Actually, the main reason which drove us toward performing virus scanning as an offline process was performance. As we deal with large amounts of e-mails, we found the way amavisd-new or other filtering manage