Double check your spam folder to ensure that the email is not being trapped as spam.
Make sure that the from address is a valid email address for your domain. If you wish to use a dynamic address, click the from button in the UE wizard to go to the advanced settings screen, and use the dynamic address for the Reply to address, and your valid email address for the from address.
Some hosts will require that the option to include the From Address as an extra parameter is checked. This option is on the mail server settings tab
You may want to enter enter your organization name, and also add an x-mailere as well.
If all else fails, you may need to use a different SMTP server for sending the emails. The way universal email works is to compile the email message and pass it to the SMTP server. It is up to the SMTP server to relay the email message to the recipient. If the SMTYP server is not relaying the email message, then you will need to gain access to it's error logs to determine why it is not relaying the message.
I have had luck in the past using the Gmail SMTP servers for sending email, but your host will need to support Pear Mail for this to work.
Using Gmail, you would need to use your gmail address as the from address address, then on the mail servers tab, set the mail object to Pear mail for SMTP.
set the email server address to:
and use port:
you will need to enable authentication and use your Gmail address for the username, and your gmail password for the password.