Hi All,

This is my first post to ms exchange forum am getting  Log onto incoming mail server (POP3): Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance. in my outlook clients, till last Sunday (12.04.15) my exchange was well & good, Monday morning suddenly the problem started like none of our outlook pop3 clients are able to communicate with exchange (rest  IMAP, SMTP & Exchange accounts are working fine). i have tried with all port no but no luck. please help me to get raid of this one.

Exchange 2013 CU6 with server 2012 Std 64Bit

Thanks,

Murali 

• Edited by SJR Primecorp Thursday, April 16, 2015 6:19 AM

Never seen this issue.  How is the client configured?  Is it using SSL port 995?  Is the certificate enabled for POP valid?

Hi,

Thanks for reply it was working configuration since a year it's started suddenly in all 110 clients,

Incoming Server POP3 995

Outgoing Server SMTP 587

Type of encrypted connection Auto

  Server TimeOuts 1Minutes

with Default self signed certificate.

I tried with all kind of port & encrypted connection type.

Error MSG below.

Task 'helpdesk@primecorp.co (1) - Receiving' reported error (0x800CCC1A) : 'Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance.'

Thanks

• Edited by SJR Primecorp Thursday, April 16, 2015 10:32 AM

Have you tried SSL for the type of encrypted connection?

Hi,

I tried with all port & encrypted connection type (SSL, TSL, Auto, None)

Thanks

HI,

Am not able to telnet to mailserver.primecorp.co 995 &  mailserver.primecorp.co 110, 

Rest of the protocols MAPI=135, SMTP=587,25. IMAP=143, 993. are working.

Thanks,

Murali

Hi,

According to your post, I understand that IMAP and POP account cannot send message with error Your server does not support the connection encryption type specified. Try changing the encryption method..
If I misunderstand your concern, please do not hesitate to let me know.

If we want to deploy IMAP and POP3 for internal and external access, we have to configure internal and external host name for IMAP, POP and SMTP, internal and external port number, internal and external encryption method.
Please run below command to double check those settings:

Get-ImapSettings | FL ExternalConnectionSettings,InternalConnectionSettings,ExtendedProtectionPolicy,Server, SSLBindings, UnencryptedOrTLSBindings

Get-PopSettings | FL ExternalConnectionSettings,InternalConnectionSettings,ExtendedProtectionPolicy,Server, SSLBindings, UnencryptedOrTLSBindings

Besides, we must registry relevant DNS record for POP and IMAP. However, if you are using the same name which is used for SMTP delivery then you dont have to worry about DNS record, only ports.
By the way, we can enable configuration so that user can use OWA to look up the setting of POP, IMAP, SMTP. Please refer to User settings to configure POP3 or IMAP4 access to their Exchange 2013 mailboxes section:
https://technet.microsoft.com/en-us/library/jj657728(v=exchg.150).aspx#settings

HI Allen Wang,

Thanks for reply, please looking to below chart so that you can able to understand my problem better & request you to do needful.

Protocol	OWA	Outlook	Ports
SMTP	working	working	587 & 25
IMAP	working	working	993 & 143
POP	working	Not working	995 & 110
MAPI	working	working

Thanks

• Edited by SJR Primecorp 21 hours 54 minutes ago

Dear All,

I have found the solution for above problem, the problem has occur due to PopProxy inactivity please find relevant exchange management shell commends below.

1. Get-ServerComponentstate -Identity <yourmailserver.com> 

Server Component State

yourmailserver.com ServerWideOffline Active
yourmailserver.com HubTransport Active
yourmailserver.com FrontendTransport Active
yourmailserver.com Monitoring Active
yourmailserver.com RecoveryActionsEnabled Active
yourmailserver.com AutoDiscoverProxy Active
yourmailserver.com ActiveSyncProxy Active
yourmailserver.com EcpProxy Active
yourmailserver.com EwsProxy Active
yourmailserver.com ImapProxy Active
yourmailserver.com OabProxy Active
yourmailserver.com OwaProxy Active
yourmailserver.com PopProxy Inactive
yourmailserver.com PushNotificationsProxy Active
yourmailserver.com RpsProxy Active
yourmailserver.com RwsProxy Active
yourmailserver.com RpcProxy Active
yourmailserver.com UMCallRouter Active
yourmailserver.com XropProxy Active
yourmailserver.com HttpProxyAvailabilityGroup Active
yourmailserver.com ForwardSyncDaemon Active
yourmailserver.com ProvisioningRps Active
yourmailserver.com MapiProxy Active
yourmailserver.com EdgeTransport Active
yourmailserver.com HighAvailability Active
yourmailserver.com SharedCache Active

2. Set-ServerComponentState -Identity mailserver -Component PopProxy -Requester HealthAPI -State Active

3. Get-ServerComponentstate -Identity <yourmailserver.com> 

Server Component State

yourmailserver.com ServerWideOffline Active
yourmailserver.com HubTransport Active
yourmailserver.com FrontendTransport Active
yourmailserver.com Monitoring Active
yourmailserver.com RecoveryActionsEnabled Active
yourmailserver.com AutoDiscoverProxy Active
yourmailserver.com ActiveSyncProxy Active
yourmailserver.com EcpProxy Active
yourmailserver.com EwsProxy Active
yourmailserver.com ImapProxy Active
yourmailserver.com OabProxy Active
yourmailserver.com OwaProxy Active
yourmailserver.com PopProxy Active
yourmailserver.com PushNotificationsProxy Active
yourmailserver.com RpsProxy Active
yourmailserver.com RwsProxy Active
yourmailserver.com RpcProxy Active
yourmailserver.com UMCallRouter Active
yourmailserver.com XropProxy Active
yourmailserver.com HttpProxyAvailabilityGroup Active
yourmailserver.com ForwardSyncDaemon Active
yourmailserver.com ProvisioningRps Active
yourmailserver.com MapiProxy Active
yourmailserver.com EdgeTransport Active
yourmailserver.com HighAvailability Active
yourmailserver.com SharedCache Activ

Replace yourmailserver.com with your server host name.

Thanks

• Edited by SJR Primecorp 5 minutes ago