hi
i am using dovecot version2.2.7 provided by qmailtoaster - 64 bit on centos 6.5
64 bit system - 16 gb ram with a hex core processor.
i was using qmail pop3 on a 32 bit system for the past over 7 years and had
absolutely no issues.
with dovecot pop3 i have started receiving a variety of problems
mac machines and ipads -- port 110 does not work at all. i have to use port 995
only.
i have allowed plain text auth.
thunderbird works perfectly -- both imap and pop3 with port 110 and port 995
outlook 2010 also works but is slow in some cases.
incase of one customer using outlook the mail download is very slow. while
carrying to receiving i can see the outlook making multiple connections and the
session becomes very slow. if the user cancels send receive and starts the
download again then it pickups speed but once again it slows down.
i have a windows servers with mailenable mail server and the same customer
could download perfectly from those windows servers.
i am using the default "service pop3" settings
Do i need to increase the memory settings / for pop3 login similar to service
imap-login . (pl see config file below)
My mail server is busy with around 4000 mailboxes and transacting over 200k
emails per day. atleast around 250 simultaneous pop3 connections during peak
hours.
there are no errors in the dovecot log file.
# dovecot -a | grep pop3_uidl_format
pop3_uidl_format = %08Xu%08Xv
[root@ns1 spamassassin]# dovecot -n
# 2.2.7: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-431.29.2.el6.x86_64 x86_64 CentOS release 6.5 (Final)
auth_cache_negative_ttl = 0
auth_cache_size = 32 M
auth_cache_ttl = 30 mins
auth_mechanisms = plain login digest-md5 cram-md5
default_login_user = vpopmail
disable_plaintext_auth = no
first_valid_gid = 89
first_valid_uid = 89
log_path = /var/log/dovecot.log
login_greeting = ready.
mail_max_userip_connections = 50
mail_plugins = " quota"
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character
vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy
include variables body enotify environment mailbox date ihave
namespace {
inbox = yes
location =
prefix =
separator = .
type = private
}
passdb {
args = cache_key=%u webmail=127.0.0.1
driver = vpopmail
}
plugin {
quota = maildir:ignore=Trash
quota_rule = ?:storage=0
}
protocols = imap pop3
service imap-login {
client_limit = 256
process_limit = 400
process_min_avail = 4
service_count = 0
vsz_limit = 384 M
}
ssl_cert = </var/qmail/control/servercert.pem
ssl_dh_parameters_length = 2048
ssl_key = </var/qmail/control/servercert.pem
userdb {
args = cache_key=%u quota_template=quota_rule=*:backend=%q
driver = vpopmail
}
protocol imap {
imap_client_workarounds = delay-newmail
mail_plugins = " quota imap_quota"
}
protocol pop3 {
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
pop3_fast_size_lookups = yes
pop3_lock_session = no
pop3_no_flag_updates = yes
}
i am really puzzled because dovecot was highly recommended by all.
thanks for all your help
rajesh
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