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- iRedMail 版本号：0.85
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：OpenLDAP
- 使用的 Linux/BSD 发行版名称及版本号：ubuntu 12.04
- 与您的问题相关的日志信息：
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张工，我这边升级clamav(先卸载后安装，配置文件保留)， 升级后 手动命令扫描 均无问题，但是top后发现CPU amavis 占用100% 现象，很频繁，查看了 mail.err日志 如下：
Dec  2 15:52:10 sh-mail amavis[4946]: (04946-08) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:52:20 sh-mail amavis[4950]: (04950-05) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:52:33 sh--mail amavis[4946]: (04946-09) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:52:50 sh-mail amavis[5373]: (05373-10) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:54:38 sh-mail amavis[5373]: (05373-11) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:54:38 sh--mail amavis[4946]: (04946-10) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:55:01 sh-mail amavis[5373]: (05373-13) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:55:02 sh--mail amavis[4946]: (04946-11) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:55:21 sh-mail amavis[4946]: (04946-12) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:55:29 sh-mail amavis[5658]: (05658-01) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:55:45 sh-mail amavis[4946]: (04946-13) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:55:56 sh-mail amavis[5658]: (05658-02) (!!)WARN: all primary virus scanners failed, considering backups
Dec  2 15:56:33 sh-mail amavis[4946]: (04946-14) (!!)WARN: all primary virus scanners failed, considering backups

麻烦张工，抽出宝贵的时间，来帮我排查下怎么解决，谢谢了！！