归档邮件存储在主服务器上，较旧的文件迁移到专用归档服务器的邮件归档中。
Active mail files were stored on a primary server, and older documents were migrated to mail archives on a dedicated archive server.
归档邮件存储在主服务器上，较旧的文件迁移到专用归档服务器的邮件归档中。
Active mail files were stored on a primary server, and older documents were migrated to mail archives on a dedicated archive server.
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