There are a multitude of packages. At least one will meet your needs. As the name implies, shareware packages tend be cheaper because they are created and distributed specifically for non-commercial use.
Users accessing networks on an interactive basis tend to stay connected longer to the network.
As a result, these on-line packages tend to be used by countries which have easy access to telephone lines, cheaper or free local calls and to more than one network. Software for off-line access is configured for a specific network. This type of link tends to require very short telephone calls lasting usually just a few minutes, depending on the amount of e-mail being sent and received. The software automates most exchanges with the network. Users who need to make long distance calls to access networks can save money with this type of link.