In a great example of Utopians helping Utopians, hosting customer and Labs moonlighter Tim Hamilton has whipped up a couple screencasts showing how to make the changes to your SMTP server port settings described in our last post. If your ISP is blocking your outbound port 25, Tim has videos for both Microsoft Outlook and Mozilla Thunderbird that will help you send outgoing mail on port 587 instead.

Tim happens to be a Windows® user; we’re working on a screencast for Apple Mail to add soon.

Note that if your ISP is not creating problems sending your domain’s email through Utopian.net SMTP servers on the usual port 25 (and very few customers have run into this so far), then this post, and these screencasts, do not apply to you. If you’re not having problems sending email, no change is needed. If you are having problems with SMTP on port 25, closely read the posts tagged with RFC 2476, and carefully watch Tim’s appropriate screencast for your email client, before changing any settings.

If you need more help with Utopian.net email service for your domain, contact support@utopian.net.

We’ve seen more of our customers running into silly port 25 blocks thrown up by their home ISPs. Some of the ISPs that practice this, and an explanation of the problem, are here: http://blog.dreamhosters.com/kbase/index.cgi?area=1623.

If your ISP is blocking port 25 and you’re seeing error messages like “mail.example.com not responding” or “not found” when trying to send messages through your domain’s Utopian.net SMTP server, you can change your email client settings to send outgoing mail to the SMTP server on port 587 instead of the usual port 25. Port 587 is the internet-standard submission service port, defined by RFC 2476.

Using port 587 for SMTP should allow you to send mail from your domain (once you’ve authenticated as usual with your email username and password), even in situations where your outbound port 25 is blocked.

Then you can use your restored access to mail your ISP and tell them how little you appreciate them censoring your network access without even asking.