Some voicemail greetings are too loud and distracting and some are so quiet you can barely figure out who you’ve called. Whoever sets up the voicemail greeting for a business should be a confident speaker. Here’s a pro tip—write out a script of what the voicemail greeting should say and practice it a few times before you record it. It will be well worth it in the end!
It might be a short voicemail message that you’re recording, but you do want to make sure you hit all the bullet points. It also helps to speak eloquently over the phone and that works better when you are prepared with what you’re about to say. You are trying to sell yourself in this message so put your best foot forward. If you practice and write down what you’re going to say, you can get rid of all the awkward pauses, ums, and stumbling over words.

But even that has its limits. "Voicemail transcription still requires customers to leave a message, and they're just not doing that," Boalt says.
On the other hand, a stellar professional voicemail is more than just a way to ensure callers are heard. It’s actually a gateway to encourage recruiters, clients, connections, venders, and other callers to continue forward with the first step in developing a business relationship, which is them making contact. The power of the right voicemail greeting is the caller actually staying on the line to leave that contact information or gain access to an alternative contact point.