Ruby 2.4 Net::IMAP 目录 Net::IMAP Net::IMAP::BadResponseError Net::IMAP::BodyTypeAttachment Net::IMAP::BodyTypeBasic Net::IMAP::BodyTypeExtension Net::IMAP::BodyTypeMessage Net::IMAP::BodyTypeMultipart Net::IMAP::BodyTypeText Net::IMAP::ByeResponseError Net::IMAP::CramMD5Authenticator Net::IMAP::DataFormatError Net::IMAP::DigestMD5Authenticator Net::IMAP::Error Net::IMAP::FlagCountError Net::IMAP::LoginAuthenticator Net::IMAP::NoResponseError Net::IMAP::NumValidator Net::IMAP::PlainAuthenticator Net::IMAP::ResponseError Net::IMAP::ResponseParseError
Ruby 2.4 
