Before I pitch our solution of DKIM support in group and pro edition of salesforce, let me tell you why DKIM is important. DKIM is a reputation system that is exclusively bound to a domain name, rather than an IP address. ...

There are some misconceptions about vicidial and pfsense compatibility. Some people on vicidial forum claim that pfsense and vicidial doesn't work together, but I haven't found that to be true in this particular setup i did for my client. ...

This is a configuration that we use as an antispam gateway for an internal mail server. The antispam gateway receives email from internet, scans it for spam and virus, if found, rejects the bad email during smtp conversation with the spammer. ...

I have been a postmaster for the most part of the last decade, and I have always preferred postfix as my preferred MTA. However, recently I started playing with opensmtpd, the default SMTP server in openBSD. It is available for linux as opensmtpd-portable package, so you can run it on linux as well. ...

Amazon EC2 has been phasing out their t1.micro instances. All new micro instances need to be started as t2.micro instance. ...

Often times you would want to limit your outgoing email from powermta to an specific recipient domain, say example.com. In powermta the way to do this is: ...

This post is about monitoring a postfix server with zabbix, and at the same time saving the postfix mail statistics to zabbix. I assume that you already have a zabbix server running either in another server, or in the same server as the mail server. ...