MailArchive supports more mail providers than you think. All MailArchive needs is an IMAP interface. Just add a new IMAP account under settings. Here are the server details for the more well-known ones. Yahoo!Yahoo! uses a non-standard IMAP server, which is supported by MailArchive v1.3+.
Server:
| imap-ssl.mail.yahoo.com | Encryption: | SSL/TLS
| Port: | 993
| Username:
| <you>@yahoo.com |
|