The provider database is simply a collection of files with attributes. To addnew provider to the image rdef files are used. In the jam file you have to addthe new provider name. Here an example rdef file:resource(1, "POP Server") "pop.gmx.net";resource(2, "IMAP Server") "imap.gmx.net";resource(3, "SMTP Server") "mail.gmx.de";resource(4, "POP Authentication") 0;resource(5, "SMTP Authentication") 1;resource(6, "POP SSL") 0;resource(7, "IMAP SSL") 0;resource(8, "SMTP SSL") 0;resource(9, "Username Pattern") 0;you can pass the following options to the last six items:"POP Authentication":0 plain text1 APOP"SMTP Authentication":0 none1 ESMTP2 POP3 before SMTP"POP SSL":0 No encryption1 SSL"IMAP SSL":0 No encryption1 SSL"SMTP SSL":0 Unencrypted1 SSL"Username Pattern":0 username is the email address (default)1 username is the local-part of the email address local-part@domain.net2 no username is proposed