Hello All
I have three servers in an Exchange 2013 DAG. Lets call them EX2013-MB1, MB2 and MB3.
I have configured POP Across the board. All of a sudden the other day POP stopped working on MB1. After some troubleshooting, if I launch a telnet session to port 110 from MB1, it connects and works fine. Any other machine, nothing, connection immediately drops.
I have the firewall disabled, so it's not the firewall blocking the connection by any means.
Any ideas? Below are my Get-PopSettings, and Test-PopConnectivity
[PS] C:\Windows\system32>Get-PopSettings | FL
RunspaceId : 66d8dee7-2a6e-4fbe-9b20-a15e79da7978
Name : 1
ProtocolName : POP3
MaxCommandSize : 512
MessageRetrievalSortOrder : Ascending
UnencryptedOrTLSBindings : {0.0.0.0:110}
SSLBindings : {0.0.0.0:995}
InternalConnectionSettings : {EX2013-MB1.PRIVATE DOMAIN.com:995:SSL, EX2013-MB1.PRIVATE DOMAIN.com:110:TLS}
ExternalConnectionSettings : {}
X509CertificateName : EX2013-MB1
Banner : The Microsoft Exchange POP3 service is ready.
LoginType : PlainTextLogin
AuthenticatedConnectionTimeout : 00:30:00
PreAuthenticatedConnectionTimeout : 00:01:00
MaxConnections : 2147483647
MaxConnectionFromSingleIP : 2147483647
MaxConnectionsPerUser : 16
MessageRetrievalMimeFormat : BestBodyFormat
ProxyTargetPort : 9955
CalendarItemRetrievalOption : iCalendar
OwaServerUrl :
EnableExactRFC822Size : False
LiveIdBasicAuthReplacement : False
SuppressReadReceipt : False
ProtocolLogEnabled : True
EnforceCertificateErrors : False
LogFileLocation : C:\Program Files\Microsoft\Exchange Server\V15\Logging\Pop3
LogFileRollOverSettings : Daily
LogPerFileSizeQuota : 0 B (0 bytes)
ExtendedProtectionPolicy : None
EnableGSSAPIAndNTLMAuth : True
Server : EX2013-MB1
AdminDisplayName :
ExchangeVersion : 0.10 (14.0.100.0)
DistinguishedName : CN=1,CN=POP3,CN=Protocols,CN=EX2013-MB1,CN=Servers,CN=Exchange Administrative
Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=FH Paschen,CN=Microsoft
Exchange,CN=Services,CN=Configuration,DC=PRIVATE DOMAIN,DC=com
Identity : EX2013-MB1\1
Guid : 83942b2a-5dff-4b63-b33b-234944c2bc46
ObjectCategory : PRIVATE DOMAIN.com/Configuration/Schema/ms-Exch-Protocol-Cfg-POP-Server
ObjectClass : {top, protocolCfg, protocolCfgPOP, protocolCfgPOPServer}
WhenChanged : 7/10/2014 3:28:48 PM
WhenCreated : 12/24/2013 11:04:05 AM
WhenChangedUTC : 7/10/2014 8:28:48 PM
WhenCreatedUTC : 12/24/2013 5:04:05 PM
OrganizationId :
OriginatingServer : FHP-DS8.PRIVATE DOMAIN.com
IsValid : True
ObjectState : Unchanged
RunspaceId : 66d8dee7-2a6e-4fbe-9b20-a15e79da7978
LocalSite : MainOffice
SecureAccess : False
VirtualDirectoryName :
Url :
UrlType : Unknown
Port : 995
ConnectionType : Ssl
ClientAccessServerShortName : EX2013-MB1
LocalSiteShortName : MainOffice
ClientAccessServer : EX2013-MB1.PRIVATE_DOMAIN.com
Scenario : Test POP3 Connectivity
ScenarioDescription : Connect to server using POP3 protocol, search for the test message, and delete it along
with any messages that are older than 24 hours.
PerformanceCounterName : POPConnectivity-Latency
Result : Failure
Error : Microsoft.Exchange.Monitoring.ProtocolException: Authentication failed. The connection
is being closed.
Unable to read data from the transport connection: An established connection was aborted
by the software in your host machine.Server response while making connection:[]. --->
System.IO.IOException: Unable to read data from the transport connection: An established
connection was aborted by the software in your host machine. --->
System.Net.Sockets.SocketException: An established connection was aborted by the
software in your host machine
UserName : extest_08569ee75e264
StartTime : 7/10/2014 4:02:33 PM
Latency : 00:00:00.0359767
EventType : Error
LatencyInMillisecondsString :
Identity :
IsValid : True
ObjectState : New