While there are a number of resources to help coach users in making a proficient voicemail greeting, some users still feel they are not doing enough. As such, there are a number of tools currently available to help even further. a. Professional Voice Recording: Now that you’re versed in the process of recording your greeting, you may feel a burdening sense of responsibility. As such, you may find that weight to be too heavy to lift alone. Well, rest easy. There are a number of companies and services for recording quality professional greetings.
Whether it’s an out-of-stock product, a canceled event, or social media snafu, there are times when your business may see an influx of frustrated callers. While it is important to address their concerns head-on, you may not be able to answer each call as it’s received. Make sure you use best practices for dealing with angry customers, and that your voicemail greeting sets the appropriate tone. Avoid defensive language, validate their concerns, and keep them informed as to how you are handling the situation.

If someone is listening to your voicemail greeting it's only because they intend to leave you a message. Don't make them listen to 3 minutes of rambling in order to do so. Plus, you're more likely to deliver a clean, professional read if you stick to shorter greetings. If more specific information is needed, direct callers to where they can find it on your website.
Ideally, a business should have a complete set of messages for every phase of their call flow from beginning to end. While voicemail greetings are an important part of the phone system, there need to be recordings for everything leading up to the voicemail as well (assuming there are other steps in the call flow).