Greetings,

We have many iOS clients, and some report that they’re having problems with iOS mail copying messages to their Sent folder. This happens 2 - 3 times per day, and the phone just says Sending and the client never knows if it sends. Client says apparently email DOES go out, but there is no recording of it. This is usually on our LAN.

We’re not sure if this is solved via Postfix or Dovecot, or maybe something else, so I’m posting this message on both forums as a start. Can anyone point us in the right direction here?

Running Postfix 2.11.1 and Dovecot ee 2.2.18.2

see doveconf -n below:

# 2.2.18.2 (866bffbafde7): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.8 (73d4f6cd676a) # OS: Linux 2.6.32-358.el6.x86_64 x86_64 CentOS release 6.4 (Final) ext4 auth_mechanisms = plain login auth_verbose = yes auth_verbose_passwords = plain deliver_log_format = msgid=%m: from=%f: %$ lock_method = dotlock mail_home = /vmail/%d/%n/home mail_location = maildir:/vmail/%d/%n mail_plugins = " notify" 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 index ihave duplicate namespace { inbox = yes location = prefix = separator = / type = private } passdb { args = /etc/dovecot/dovecot-mysql.conf driver = sql } plugin { mail_log_events = delete expunge copy mailbox_delete flag_change append mailbox_rename mail_log_fields = box msgid from flags sieve = /vmail/%d/%n/home/.dovecot.sieve sieve_before = /etc/dovecot/sieve/junk-spam.sieve sieve_default = /etc/dovecot/sieve/junk-spam.sieve sieve_dir = /vmail/%d/%n/home/sieve } protocols = imap lmtp sieve service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } unix_listener auth-master { group = vmail mode = 0660 user = vmail } unix_listener auth-userdb { mode = 0660 user = vmail } user = root } service imap-login { process_limit = 200 process_min_avail = 16 service_count = 0 vsz_limit = 0 } service managesieve-login { inet_listener sieve { port = 4190 } process_min_avail = 0 service_count = 1 vsz_limit = 64 M } ssl_cert =