We currently perform some sophisticated challenges at the SMTP mail acceptance stage. This is proving effective at vastly reducing the amount of spam. Most customers are reporting they receive practically zero spam.

However this process can cause some minor complications. The sending of mail can be slow at times. To combat this we have set up an SMTP Auth checking system. When you first attempt to send mail using SMTP Auth you may notice a slight delay. During this initial sending period we will log your IP address. From then any subsequent sends will be almost immediate as we know that we do not need to perform any of the intensive checks on your mail as you have already validated.

Your IP address will be stored until 06:00 the next morning at which point the IP log is cleared and will rebuild again.

This change will help increase the speed at which you can send mail as well as reduce overheads on our server as less checks need to be performed.