If the file you create is too large you can use a tool such as Online Audio Converter to compress the file. This site has a voice recorder option as well.
1. Make time for more calls. Perhaps the most apparent advantage of pre-recorded phone messages is that they save a salesperson time. Let’s say an average salesperson leaves fifty voicemails per day—not unlikely given that some 80% of sales calls go to voicemail.

Of course, we want to know as soon as an incoming voicemail is saved, so again, it’s Twilio to the rescue. By adding a few lines of code to our Python script, Stacey and I each get an SMS notification telling us there’s a new message. Note that Twilio’s API requires a separate call for each message to be sent, which is why the similar code repeats once for Stacey’s phone number and then again for mine. If you plan to send bulk messages from Twilio, I expect that you can build a list of phone numbers and loop through them with the API call. Since we only have two contact numbers and don’t expect to add any more, I decided not to loop through a list of two elements.
31. Hello, you’ve reached [your name]. I’ll be out of the office from [start date] to [end date]. Please leave a message and I’ll return your call upon my return. Alternatively, you can email me at [email address] or call [name] at [phone number] for immediate assistance. Thanks for calling!