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+# 禁用发件的垃圾邮件、病毒扫描功能
+
+要禁用发件时的垃圾邮件、病毒扫描功能，可以在 Amavisd 配置文件 `/etc/amavisd/amavisd.conf` (RHEL/CentOS/Scientific Linux) 或 `/etc/amavis/conf.d/50-user` (Debian/Ubuntu) 或 `/usr/local/etc/amavisd.conf` (FreeBSD) 中增加分流设置。
+
+* bypass_spam_checks_maps
+* bypass_virus_checks_maps
+* bypass_header_checks_maps
+* bypass_banned_checks_maps
+
+这些设置可以以设置块的形式进行添加 `$policy_bank{'MYUSERS'}` ，例如：
+
+```perl
+$policy_bank{'MYUSERS'} = {
+    [...OMIT OTHER SETTINGS HERE...]
+
+    # don't perform spam/virus/header check.
+    bypass_spam_checks_maps => [1],
+    bypass_virus_checks_maps => [1],
+    bypass_header_checks_maps => [1],
+
+    # allow sending any file names and types
+    bypass_banned_checks_maps => [1],
+}
+```
+
+更改设置后，需要重启 Amavisd 服务，以使更改生效。