John Luif

Recently Clydesdale Software deployed a new site which heavily leverages the sending of emails.

My first approach was to run our own smtp server which in the end turned out to be a headache with spam and blacklists.

Next, was using the clients existing smtp which they pay a service company for. This service company only allows so many emails to be sent each hour. So another no go.

The solution, redundant smtp servers and a pay for smtp server. The first attempt to send an email is done by AuthSmtp. AuthSmtp is an affordable service which makes it very easy to upgrade and downgrade your service level that is based on how many emails you send. The second smtp server is the one the client has that only allows so many emails per hour. And the secret sauce, Advanced Smtp Server which lets you define multiple smtp gateways and will try each one in order. It also uses a queue and the messages will be retried to send if a failure occurs.