When you want to communicate a message, you need to "send out" your thoughts. But sometimes, you need to use different words for this action to make your statement more meaningful. For instance, you can "dispatch" or "deliver" a message, which means, to send it out to a specific person or group. Another option is to "transmit" or "transmit" information, meaning to communicate it through a medium, like a phone or computer. You can also "forward" a message, which means to send it to someone else or "mail" it, which is the act of posting an item.
On the other hand, if you want to convey a feeling or emotion, you can use "emit," which means to send out something, like energy or light.