Sí, eso lo he visto, pero añado el mío y me sigue saliendo el mismo error tratando de leer el correo:
Fecha y hora: 22/08/15 19:23:54
Error: An error occurred during a connection to xxxx.xxx:995.
SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message.
(Error code: ssl_error_weak_server_ephemeral_dh_key)
Fecha y hora: 22/08/15 19:23:54
Error: xxxx.xxx:995 uses an invalid security certificate.
The certificate is not trusted because it is self-signed.
(Error code: sec_error_unknown_issuer)
[he sustituido mi servidor por xxxx.xxx]