As you are interested in a post with such a long title, I suppose that you have already the knowledge of sip, sipp, and openIMScore. If not, please don’t continue, it will be of no use and help.
As you can see in the above picture, the SMTP service is disabled for the free hosting accounts, whereas PHP Sendmail enabled. Hui-wang.info is currently hosted by byethost.com. The problem is that mails sent from my site arrive at the destination in a very big delay. And there was one time that my site was blocked due to a not very heavy mail traffic. Here is how I’ve solved this not big but bothering issue.