Complex sentence: This was possible because EarthLink does not use TLS encryption for the login on its POP3 services, however, customers can use encryption services on IMAP or through EarthLink's Web Mail if desired.
Split into simpler sentences: This was possible because EarthLink does not use TLS encryption for the login on its POP3 services. However, customers can use encryption services on IMAP or through EarthLink's Web Mail if desired.