Email endpoint not picking up messages from mailbox

[Jochem_van_Dieten]

We have an email endpoint configured pointing to an IMAP mailbox on the Exchange server. Yet when messages arrive at the mailbox, the process isn't started. Things we checked:

• Authentication information is good. (No error when I save the endpoint configuration, but I do get an error if I fill out the incorrect password on purpose).
• No messages in the log file. Nothing at all.
• Messages are present in the mailbox.
• Account has read access to the mailbox.
  

I have tested the mailbox on the server by logging in manually from telnet. As you can see from the trace below, there are messages present in the INBOX on the server:

* OK Microsoft Exchange Server 2003 IMAP4rev1 server version 6.5.7638.1 (server.company) ready.
a001 LOGIN username password
a001 OK LOGIN completed.
a002 SELECT INBOX
* 7 EXISTS
* 5 RECENT
* FLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)
* OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)] Permanent flags
* OK [UNSEEN 1] Is the first unseen message
* OK [UIDVALIDITY 61844] UIDVALIDITY value
a002 OK [READ-WRITE] SELECT completed.
a004 LOGOUT
* BYE Microsoft Exchange Server 2003 IMAP4rev1 server version 6.5.7638.1 signing off.
a004 OK LOGOUT completed.

The endpoint configuration as exported from my browser:

Id	Name	Type	Value	Label
endpoint_name	endpoint_name	text	receiveMailExtern	Name:
endpoint_description	endpoint_description	textarea		Description:
cronExpression	cronExpression	text	0 0/1 * * * ?	Cron Expession:
endpoint_id	endpoint_id	hidden	202
page	page	hidden	0
serviceId	serviceId	hidden	receiveMailExtern
majorVersion	majorVersion	hidden	1
minorVersion	minorVersion	hidden	0
repeatCount	repeatCount	text	-1	Repeat Count:
repeatInterval	repeatInterval	text	10	Repeat Interval:
startDelay	startDelay	text	0	Delay when job starts:
batchSize	batchSize	text	2	Batch Size:
userName	userName	text	SuperAdmin	User Name:
domainName	domainName	text	DefaultDom	Domain Name:
domainPattern	domainPattern	text	*	Domain Pattern:
filePattern	filePattern	text	*	File Pattern:
recipientSuccessfulJob	recipientSuccessfulJob	text		Successful Job's Recipients:
recipientFailedJob	recipientFailedJob	text		Failed Job's Recipients:
inboxHost	inboxHost	text	server.domain	Inbox Host:
inboxPort	inboxPort	text	143	Inbox Port:
inboxProtocol	inboxProtocol	select		Inbox Protocol:
inboxTimeOut	inboxTimeOut	text	60	Inbox Time out:
inboxUser	inboxUser	text	username	Inbox User:
inboxPassword	inboxPassword	password	password	Inbox Password:
inboxSSLEnabled	inboxSSLEnabled	checkbox	false	POP3/IMAP SSL Enabled
smtpHost	smtpHost	text	server.domain	SMTP Host:
smtpPort	smtpPort	text	25	SMTP Port:
smtpUser	smtpUser	text	username	SMTP User:
smtpPassword	smtpPassword	password	password	SMTP Password:
sendFrom	sendFrom	text		Send From:
charSet	charSet	select		Character Set Encoding:
smtpSSLEnabled	smtpSSLEnabled	checkbox	false	SMTP SSL Enabled
failedJobFolder	failedJobFolder	text		Failed Email Sent Folder:
asynchronous	asynchronous	checkbox	true	asynchronous
operationName	operationName	select		Operation Name:
type-invoke-0	type-invoke-0	select
constant-invoke-0	constant-invoke-0	text
variable-invoke-0	variable-invoke-0	text	*
type-invoke-1	type-invoke-1	select
constant-invoke-1	constant-invoke-1	text
variable-invoke-1	variable-invoke-1	text	%SENDER%

[Jochem_van_Dieten]

The issue was resolved by a restart. The current theory is that due to some DNS caching the endpoint was checking the empty mailbox on the old mailserver instead of the the full mailbox on the new server.