This image allows you to run POSTFIX internally inside your docker cloud/swarm installation to centralise outgoing email sending. The embedded postfix enables you to either send messages directly or ...

These are a sanatized set of files that will allow SMTP relay functionality to M365 tenants. This is a semi-secure configuration (i.e. non-open relay). Additionally this relay was designed to be ...

Although this article provides instructions on setting up an integrated mail server using Postfix, OpenLDAP and Courier-IMAP, it does not discuss how these software components were chosen, which could ...

Please note that this book is based on is based on Postfix 2.1, later versions of Postfix have new daemons not discussed in the book. This chapter describes how ...

The server suddenly (just this afternoon) started refusing external email because our Barracuda is allegedly listed in zen.spamhaus.com (though checking the IP on the site says it's clear, so the ...