OTRS 3.2 POP3S Auth for user ***** failed!

[danny0312]

Hello Everyone!

I am faced with an issue and can't really figure out what might be causing it.
I have setup an email account in admin/PostMaster Mail Accounts so OTRS can fetch an incoming mail. It seemed to work at first but then when I looked at log I keep getting a message:

OTRS-otrs.PostMasterMailbox.pl-10[2552]: [Error][Kernel::System::MailAccount::POP3S::_Fetch][Line:149]: POP3S: Auth for user ******* failed!

I know that it seems like auth problem but credentials are correct! As I said, it seems to fetch incoming emails just fine, however this error still occurs. Also, I have noticed that at that same time when I click "fetch" using GUI it also gives me an error. Then, after couple of minutes it works just fine.

Tried to telnet to that mail account during a log entry and it was successful. So it seems to me like it is a bug inside OTRS.

Any help/advice is appreciated!

mail: POP3S Exchange
OTRS: 3.2

[jojo]

check your Exchange Server.

- POP3S might be locked due to another access to the mailbox
- permissions for this user might be wrong

[danny0312]

check your Exchange Server.

- POP3S might be locked due to another access to the mailbox
- permissions for this user might be wrong

Thanks for your reply!

Could you please be more specific?
"- POP3S might be locked due to another access to the mailbox
- permissions for this user might be wrong"

I think that if POP3S was locked, it wouldn't work at all right? However, it works but it is not stable. I have setup a cron job to fetch email every 5 min and from the log I can see that auth fails sometimes once in 5 min, sometimes in 10, 20 or even 30 minutes.

How do I check for permissions?

[crythias]

It's possible that your POP3 Server is blocking you for too-frequent fetches. There might be a hard-coded 15 minute limit between allowed fetches.

[danny0312]

It's possible that your POP3 Server is blocking you for too-frequent fetches. There might be a hard-coded 15 minute limit between allowed fetches.

I thought about that. But I don't really think that is an issue. I am able to click "fetch" from gui couple times in a row and it doesn't give me any error. So I assume that POP3 server is able to handle frequent fetches. What I don't understand that why auth failures happen just randomly...

Cron job is set to fetch emails every 5 min but I don't see auth failures each fetch.


Update:

During some research I found an OTRS github repository (https://github.com/OTRS/otrs) and decided to try out the POP3TLS.pm module which is not available in my current version of OTRS (3.2). After I installed and reconfigured postmaster mail to use POP3TLS it seems that issue doesn't appear that often as it used to. Now the message in a log says "Can't connect to "hostname" as opposed to "Auth for user **** failed". Failures occur once in 20-40 minutes. Any suggestions???