主题: CentOS7下安装iRedMail缺少Amavisd、ClamAV等组件
==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：0.9.5-1
- 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：Centos7
- 与您的问题相关的日志信息：见下方
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今天尝试在CentOS7下全新安装iRedMail，CentOS也是新装的，安装完成发现少了Amavisd、ClamAV等组件，恢复系统后再次安装iRedMail，发现yum安装过程中提示找不到amavisd等组件的安装包，见以下输出：
安装命令为：IREDMAIL_MIRROR='http://42.159.241.31' bash iRedMail.sh
[ INFO ] Add yum repo for SOGo: /etc/yum.repos.d/sogo.repo.
[ INFO ] Installing package(s): postfix openldap openldap-clients openldap-servers mariadb-server mod_ldap php-common php-gd php-xml php-mysql php-ldap php-pgsql php-imap php-mbstring php-pecl-apc php-intl php-mcrypt php httpd mod_ssl dovecot dovecot-pigeonhole dovecot-mysql dovecot-pgsql amavisd-new spamassassin altermime perl-LDAP perl-Mail-SPF unrar pax clamav clamav-update clamav-server clamav-server-systemd php-pear-Net-IDNA2 sogo sogo-activesync libwbxml sogo-ealarms-notify sogo-tool sope49-gdl1-mysql sope49-ldap python-sqlalchemy python-setuptools python-dns python-ldap MySQL-python python-jinja2 python-webpy python-netifaces python-beautifulsoup4 python-lxml py-bcrypt mod_wsgi awstats fail2ban unzip bzip2 acl patch tmpwatch crontabs dos2unix logwatch
Loaded plugins: fastestmirror, langpacks
Not using downloaded repomd.xml because it is older than what we have:
Current : Tue Nov 15 22:00:31 2016
Downloaded: Fri Jul 29 08:51:01 2016
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* extras: mirrors.163.com
* updates: mirrors.aliyun.com
No package php-imap available.
No package php-pecl-apc available.
No package php-mcrypt available.
No package amavisd-new available.
No package altermime available.
No package clamav available.
No package clamav-update available.
No package clamav-server available.
No package clamav-server-systemd available.
No package php-pear-Net-IDNA2 available.
Package python-setuptools-0.9.8-4.el7.noarch already installed and latest version
No package python-netifaces available.
No package python-beautifulsoup4 available.
Package python-lxml-3.2.1-4.el7.x86_64 already installed and latest version
No package py-bcrypt available.
No package awstats available.
No package fail2ban available.
看了下/etc/yum.repos.d下的repo文件，iRedMail.repo已正确添加，baseurl=http://42.159.241.31/yum/rpms/7/，没发现什么问题，我尝试了下用yum install amavisd-new命令手动安装，也提示没有可用软件包。
请张工帮忙分析下是什么问题，谢谢。