I have created a blog for a client of a client. The blog has MailPress installed, but the person I am working for got the error when trying out the MailPress blog registration widget. I had done most of the work, and to the best of my knowledge this had not been an issue before. The error show up in Internet Explorer, FireFox, Opera, Safari, and Chrome. NextGEN Gallery is installed, but the sidebar with the widget shows up only on one page. I tried experimenting with some of the MailPress settings, but so far this has not worked. I did on-line searches with Google and Bing, and I found out that this problem has occurred for others. However, I have not found any information on how to resolve the problem successfully. I saw one comment that suggested the problem might with the settings of the mail server. What thoughts do people have on how to deal with this?