{"id":3996,"date":"2018-08-30T08:29:14","date_gmt":"2018-08-30T07:29:14","guid":{"rendered":"https:\/\/www.threesl.com\/blog\/?p=3996"},"modified":"2022-08-23T15:20:48","modified_gmt":"2022-08-23T14:20:48","slug":"using-mailsend-for-sending-alerts","status":"publish","type":"post","link":"https:\/\/www.threesl.com\/blog\/using-mailsend-for-sending-alerts\/","title":{"rendered":"Using Mailsend for Sending Alerts"},"content":{"rendered":"

Email Alerts<\/h4>\n

In our article Email Alerts<\/em>! In Cradle\u00a0<\/a> we discussed using Mailsend<\/em> utility so you can use SMTP<\/em> rather than MAPI<\/em> to send emails alerts<\/em>. We touched briefly on the configuration within Cradle<\/em> of using the utility. In this post, we’ll be expanding on that. Providing an example of a Mail Relay<\/em> within the Cradle<\/em> environment rather than talking directly to a company SMTP<\/em> server.<\/p>\n

Why use a relay?<\/h4>\n
\"sending
Mailsend<\/figcaption><\/figure>\n

So why shouldn’t we configure all the Cradle<\/em> clients to talk directly through Mailsend<\/em> to a company mail server?
\nFor starters, the company mail server may be locked down to only accept SMTP<\/em> emails from specific hosts, and so wouldn’t accept SMTP<\/em> connections from every Cradle<\/em> desktop client.<\/p>\n

Using a relay means that the company mail server only needs to accept SMTP<\/em> connections from a single host, the mail relay<\/em>, as all the Cradle Mailsend desktop <\/em>clients talk via the relay.<\/p>\n

So, how do we setup a relay<\/h4>\n

Its as simple as installing the relay software and configure it. Currently we use Postfix<\/em> in installations where we need a relay as we’re usually using Linux<\/em> as a Cradle Database Server<\/em>. Postfix<\/em> is a package available on most\/all Linux distributions<\/em>.<\/p>\n

Then its just a case of configuring it to accept incoming connections from the Cradle<\/em> desktop clients. We lock this down to a subnet of IP addresses<\/em>. Then set the relay host to being the company mail server which will deliver the email alerts. In this example we’re using Postfix<\/em> to Cradle<\/em> clients on 2 subnets, and the localhost<\/em>. The cradle.ini\/cradle.rc<\/em> files then points to the relay host and not the company mail server.<\/p>\n

eg.
\n
\n# cradle.rc
\nMAIL_HOST = cradle.example.com
\nMAIL_PORT = 25
\n<\/code><\/p>\n


\n# Postfix main.cf
\nmyhostname = cradle.example.com
\ninet_interfaces = all
\ninet_protocols = all
\nmynetworks = 192.168.0.0\/24, 192.168.1.0\/24, 127.0.0.1
\nrelayhost = [mail.example.com]:25<\/code><\/p>\n