Duplicate messages

[Miloš Dukić]

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On 12/12/14 09:39, absolutely_free at libero.it wrote:
> Hi, I just moved mail spool to a different network storage. Now,
> several users are complaining about duplicate message that are
> fetched by their clients (Outlook, Microsoft Outlook). What is the
> reason?
> 
> This is my conf:
> 
> # dovecot -n # 2.0.9: /etc/dovecot/dovecot.conf # OS: Linux
> 2.6.32-71.el6.x86_64 x86_64 CentOS release 6.6 (Final) 
> auth_mechanisms = plain login digest-md5 cram-md5 
> disable_plaintext_auth = no first_valid_gid = 89 first_valid_uid =
> 89 mail_gid = 89 mail_location = maildir:/coraid-s2l2/domains 
> mail_uid = 89 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 imapflags notify mbox_write_locks = fcntl 
> namespace { inbox = yes location = prefix = INBOX. separator = . 
> type = private } passdb { args = /etc/dovecot/dovecot-sql.conf.ext 
> driver = sql } passdb { args =
> /etc/dovecot/dovecot-sql-crypt.conf.ext driver = sql } plugin { 
> sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions =
> +notify +imapflags sieve_max_script_size = 1M } protocols = imap
> pop3 lmtp sieve ssl_cert = </etc/nginx/ssl/wildcard.server.net.crt 
> ssl_key = </etc/nginx/ssl/wildcard.server.net.key userdb { args =
> /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { 
> mail_plugins = } protocol lda { mail_plugins = }
> 
Hello,

Please check if those users have X-UIDL header in their emails. If do,
remove header. That should solve the problem.

Regards,
Miloš
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