Am 20.06.2016 um 04:15 schrieb Thomas Cameron:

Howdy -

Hi Thomas,

I am running dovecot-2.2.24-1.fc23.x86_64 on Fedora 23. It's up to date as of last night.

When I log in from a desktop using Thunderbird on Linux, my Android phone (Nexus 6P) stops receiving mail. It happens if I'm on my laptop or my desktop.

My wife has the same problem using Thunderbird on Windows. If she leaves the house and forgets to shut down her MUA, her phone can't retrieve messages.

Is this expected behavior? Can I change it? I feel like it's pretty common for folks to have multiple devices which access the same mail account. Between phones, tablets, PCs, etc., this seems like a pretty common scenario.

no, that's not to be expected and should work pretty well.

It's a pretty vanilla setup:

[root@wintermute ~]# dovecot -n # 2.2.24 (a82c823): /etc/dovecot/dovecot.conf # OS: Linux 4.4.4-301.fc23.x86_64 x86_64 Fedora release 23 (Twenty Three) mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } ssl = required ssl_cert =

# 2.2.24 (a82c823): /etc/dovecot/dovecot.conf # OS: Linux 4.5.5-300.fc24.x86_64 x86_64 Fedora release 24 (Twenty Four)

Used an F24 test VM which came up with the same Fedora default dovecot configuration. I am a bit surprised that your's provides access to mail though it has no configuration where the mailbox is located on the drive: "mail_location" is empty as well "location" in the inbox namespace.

What is being logged in /var/log/maillog when the access fails? My test system did log

Jun 20 20:37:36 fedora24 dovecot: imap-login: Login: user=<dalloz>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=13441, secured, session=<6G6V/7k1FNV/AAAB> Jun 20 20:37:36 fedora24 dovecot: imap(dalloz): Error: User initialization failed: Namespace '': Mail storage autodetection failed with home=/home/dalloz Jun 20 20:37:36 fedora24 dovecot: imap: Error: Invalid user settings. Refer to server log for more information.

Made it working by adding

mail_location = mbox:~/mail:INBOX=/var/mail/%u

to /etc/dovecot/conf.d/10-mail.conf.

2 parallel IMAP logins then were no problem at all. The default limit on your Fedora is

# doveconf | grep mail_max_userip_connections

Thanks! Thomas

Kind regards

Alexander