主题: imap方式收邮件,邮箱有很多邮件(比如邮箱目录大小已经几个G),收件非常慢(几分钟甚至无响应),怎么优化?

==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号:iredmail 0.7.3
- 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:CentOS5.4
- 与您的问题相关的日志信息:无
====

使用imap方式收取邮件的用户,当他的邮箱有很多邮件(比如邮箱目录已经有5G那么大)的时候,他使用imap协议收邮件会很慢,用Webmail也很慢(因为webmail也通过imap协议)。比如,登录webmail,输入密码后要等好几分钟甚至一直进不去。有什么办法优化吗?

回复: imap方式收邮件,邮箱有很多邮件(比如邮箱目录大小已经几个G),收件非常慢(几分钟甚至无响应),怎么优化?

对比过邮箱较少邮件的帐号么?贴一下 "dovecot -n" 命令的输出看看。

回复: imap方式收邮件,邮箱有很多邮件(比如邮箱目录大小已经几个G),收件非常慢(几分钟甚至无响应),怎么优化?

对比过,最后没办法,大邮箱邮件备份后清空了,这样访问就快了

dovecot -n 输出:

# 1.2.16: /etc/dovecot.conf
# OS: Linux 2.6.18-164.el5 x86_64 CentOS release 5.4 (Final)
log_path: /var/log/dovecot.log
protocols: pop3s imap  imaps managesieve
listen(default): *
listen(imap): *
listen(pop3): *
listen(managesieve): 127.0.0.1:2000
ssl_ca_file: /etc/pki/tls/certs/iRedMail_CA.pem
ssl_cert_file: /etc/pki/tls/certs/iRedMail_CA.pem
ssl_key_file: /etc/pki/tls/private/iRedMail.key
login_dir: /var/run/dovecot/login
login_executable(default): /usr/libexec/dovecot/imap-login
login_executable(imap): /usr/libexec/dovecot/imap-login
login_executable(pop3): /usr/libexec/dovecot/pop3-login
login_executable(managesieve): /usr/libexec/dovecot/managesieve-login
first_valid_uid: 501
last_valid_uid: 501
mail_uid: 501
mail_gid: 501
mail_location: maildir:/%Lh/Maildir/:INDEX=/%Lh/Maildir/
mail_executable(default): /usr/libexec/dovecot/imap
mail_executable(imap): /usr/libexec/dovecot/imap
mail_executable(pop3): /usr/libexec/dovecot/pop3
mail_executable(managesieve): /usr/libexec/dovecot/managesieve
mail_process_size: 1024
mail_plugins(default): quota imap_quota autocreate
mail_plugins(imap): quota imap_quota autocreate
mail_plugins(pop3): quota
mail_plugins(managesieve):
mail_plugin_dir(default): /usr/lib64/dovecot/imap
mail_plugin_dir(imap): /usr/lib64/dovecot/imap
mail_plugin_dir(pop3): /usr/lib64/dovecot/pop3
mail_plugin_dir(managesieve): /usr/lib64/dovecot/managesieve
imap_client_workarounds(default): tb-extra-mailbox-sep
imap_client_workarounds(imap): tb-extra-mailbox-sep
imap_client_workarounds(pop3):
imap_client_workarounds(managesieve):
pop3_client_workarounds(default):
pop3_client_workarounds(imap):
pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
pop3_client_workarounds(managesieve):
namespace:
  type: private
  separator: /
  inbox: yes
  list: yes
  subscriptions: yes
namespace:
  type: shared
  separator: /
  prefix: Shared/%%u/
  location: maildir:/%%Lh/Maildir/:INDEX=/%%Lh/Maildir/Shared/%%u
  list: children
  subscriptions: yes
lda:
  postmaster_address: root
  auth_socket_path: /var/run/dovecot/auth-master
  mail_plugins: quota sieve autocreate
  sieve_global_path: /data/vmail/sieve/dovecot.sieve
  log_path: /var/log/sieve.log
auth default:
  mechanisms: plain login
  default_realm: baifendian.com
  user: vmail
  passdb:
    driver: ldap
    args: /etc/dovecot-ldap.conf
  userdb:
    driver: ldap
    args: /etc/dovecot-ldap.conf
  socket:
    type: listen
    client:
      path: /var/spool/postfix/dovecot-auth
      mode: 438
      user: postfix
      group: postfix
    master:
      path: /var/run/dovecot/auth-master
      mode: 438
      user: vmail
      group: vmail
plugin:
  quota_warning: storage=85%% /usr/local/bin/dovecot-quota-warning.sh 85
  quota_warning2: storage=90%% /usr/local/bin/dovecot-quota-warning.sh 90
  quota_warning3: storage=95%% /usr/local/bin/dovecot-quota-warning.sh 95
  quota: dict:user::proxy::quotadict
  quota_rule: *:storage=0
  expire: Trash 7 Trash/* 7 Junk 30
  expire_dict: proxy::expire
  auth_socket_path: /var/run/dovecot/auth-master
  sieve: /data/vmail/sieve/%Ld/%Ln/dovecot.sieve
  autocreate: INBOX
  autocreate2: Sent
  autocreate3: Trash
  autocreate4: Drafts
  autocreate5: Junk
  autosubscribe: INBOX
  autosubscribe2: Sent
  autosubscribe3: Trash
  autosubscribe4: Drafts
  autosubscribe5: Junk
  acl: vfile
  acl_shared_dict: proxy::acl
  sieve: /data/vmail/sieve/%Ld/%Ln/dovecot.sieve
  sieve_dir: /data/vmail/sieve/%Ld/%Ln/
dict:
  expire: db:/var/lib/dovecot/expire/expire.db
  quotadict: mysql:/etc/dovecot-used-quota.conf
  acl: mysql:/etc/dovecot-share-folder.conf

回复: imap方式收邮件,邮箱有很多邮件(比如邮箱目录大小已经几个G),收件非常慢(几分钟甚至无响应),怎么优化?

有好多用户邮件是几个G,都是有时特别慢

慢的时候用imap登录邮件少的用户是否可以,是否快 我还没试

有办法查到问题原因,并优化吗?

回复: imap方式收邮件,邮箱有很多邮件(比如邮箱目录大小已经几个G),收件非常慢(几分钟甚至无响应),怎么优化?

技术上来说,几个G的 IMAP 邮箱不算很大,Dovecot 对邮件都有做索引,因此应该不会很慢才对。