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POP3 not working

==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: debian 7
- Related log if you're reporting an issue:
====

Hi,

sorry, if this has been asked before... is there a way to search this forum???

I am running iredMail and the admin for some weeks now, all is well, now I am migrating the first customer... they have an MS Exchange-Box fetching the Mail by POP3 and it does not work.
- Accounts are working on roundcube and IMAP
- I cannot telnet pop3 port like
  telnet MYHOST 110

->
Trying MYIP...
telnet: connect to address MYIP: Host is down
telnet: Unable to connect to remote host

For dovecot I found the following page http://wiki2.dovecot.org/SSL/DovecotConfiguration offering a test command:

openssl s_client -connect MYHOST:pop3s
That gives:
connect: Host is down
connect:errno=64

I have the feeling that the pop3 deamon is not runing at all... but with a POP3checker I get the error mentioned here:
http://www.iredmail.org/wiki/index.php? … t.STARTTLS

Plaintext authentication disallowed on non-secure (SSL/TLS) connections

What shall/can I do???

I did not do anything to the dovecot config ;-)


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