It isn't currently possible but I will add a to do item in our project tracker for it, I'm having troubles with my newsletter as well and need to find an alternative way to send it. Sending bulk email is a challenge, it requires a mail server with a good reputation established or a lot of the mail gets flagged as spam especially if you send too many too fast to certain popular domains.

Best,

Joe

fyi, today I implemented config options to allow using a different smtp server for newsletter and/or forum notifications. This is in the source code repository now so it will be in the next release of mojoPortal, you will be able to use these new settings:

<add key="Newsletter:SmtpServer" value="" />
  <add key="Newsletter:SmtpServerPort" value="25" />
  <add key="Newsletter:SmtpUser" value="" />
  <add key="Newsletter:SmtpUserPassword" value="" />
  <add key="Newsletter:SmtpRequiresAuthentication" value="true" />
  <add key="Newsletter:SmtpUseSsl" value="false" />
  <add key="Newsletter:SmtpPreferredEncoding" value="" />

  <add key="Forum:SmtpServer" value="" />
  <add key="Forum:SmtpServerPort" value="25" />
  <add key="Forum:SmtpUser" value="" />
  <add key="Forum:SmtpUserPassword" value="" />
  <add key="Forum:SmtpRequiresAuthentication" value="true" />
  <add key="Forum:SmtpUseSsl" value="false" />
  <add key="Forum:SmtpPreferredEncoding" value="" />

I've actually just updated this site with a build of the latest code and I've configured it to use Elastic Email for the Forums and the Newsletter on this site. It looks like a good service and I've heard good things about it from others, I guess I'll find out how well it works when I send the newsletter later this month. So if you get the notification for this forum post, it should come from Elastic Mail.

Best,

Joe