Cannot Upload or Send Email to SMS Email Addresses

Hello. I have already installed phplist, but I have an issue where the platform tells me that the sms email addresses (i.e. @messaging.sprintpcs.com) I try to import are invalid. I believe there’s a way to make the system accept them, but I have no clue as to how to do it. Any assistance would be greatly appreciated. Thanks!

@inpenterprises There is a config setting that controls the validation of email addresses. Look in the config_extended.php file to find it, then copy the line to your config.php file. I think that the value of 0 will mean no validation of entered email addresses.