Hey Julie,
From what your last reply time is around 1:46am yesterday here.
That was great, since Dreamhost supported wget and curl, perhaps you can try follow this documentation as what their provided in earlier
https://help.dreamhost.com/hc/en-us/articles/215767047
Then the command you should put something like this :
[gist type="php"]
*/5 * * * * wget -O /dev/null
https://www.yourdomain.com/components/com_easysocial/cron.php
[/gist]
Once you setup this already, then try modify this file from your file directory server JoomlaRootFolder/components/com_easysocial/cron.php
Look at this line of code and replace to your current https site domain name and save
$host = 'http://yourwebsite.com';
If those pending email still unable to send out, perhaps you can provide us with your following site details at
http://stackideas.com/dashboard/site so we can better have a check?
1. Joomla backend access
2. Dreamhost access