Dear Yahoo e-mail users.  ILOTA has learned that Yahoo is blocking or delaying many of our e-mails. In order for you to receive communication from ILOTA in a timely manner, you must change your settings in yahoo to allow for e-mails from Memberclicks-mail.net.  Otherwise, you will be missing out on many or all e-mails from us.   

More instructions can be found here.  The process is called "whitelisting."

https://www.thebalance.com/how-do-i-whitelist-email-sender-or-a-domain-in-yahoo-mail-3515043