How many messages can a computer mass messaging platform send at a time?

This is related to the technical ability and channel quality of SMS platform.

For example, a well-known SMS platform, SUBMAIL, has a single sending limit of 6,543.8+0,000.

Details are as follows:

Manually enter a single submission limit of 1000 contacts, and support variables;

File import can send up to 50,000 contacts at a time, and supports variables;

The maximum number of contacts in a single address book import is 654.38+0 million, and variables are not supported.