Exchange 2010 Pop Error
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Exchange 2010 Pop3 Logs
Question 0 Sign in to vote I recently migratedfrom Exchange 2003 to Exchange 2010. We are currently in exchange 2013 pop3 authentication coexistence mode for a while to allow time for transferring all mailboxes (15 000 +) from 2003 to 2010 servers. The problem is with POP3 / IMAP access with
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Exchange 2010 mailboxes. A few facts about my situation: - Yes, POP3 and IMAP services are enabled and on automatic startup on the 2010 CA server - Users with 2003 mailboxes can POP/ IMAP the 2010 CA server without problems - Users with 2010 mailboxes cannot POP/IMAP the 2010 CA server (even a brand-new user created through exchange 2010 pop3 not working the EMC with an Exchange 2010 mailbox (never moved from 2003)) - The POP server on the 2010 CA server is set for plain text login (does not accept NTLM), this is the desired setting because most of my clients are set up that way - This is not a protected groups issue - This is not a firewall issue - The client configuration is ok and has been triple-checked - The username and pwd has been triple-checked - OWA and Outlook accessworks without problems (for both types of mailboxes: 2003 and 2010) Error messages: - POP error message on the mail client (Thudnerbird 3): "Sending of password did not succeed. Mail server xxxxxxxxxx responded: Server Unavailable. 21" - IMAP error message on the mail client (Thudnerbird 3): "Server xxxx has disconnected. The server may have gone down or there may be a network problem." - POP3 log excerpt for a non-working user (mtest02) (raised to expert mode): OpenSession capa auth Plain R="-ERR Logon failure: unknown user name or bad password.";RpcL=-1;LdapL=-1;Msg="User:mtest _. 02:a05d8345-2b88-4b92-a2ca-65d1005b362f:General01:2010mbserver.d
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Availability Migration You are here: Home / Tutorials / Exchange Server 2010 POP3: Getting StartedExchange Server 2010 POP3: Getting Started February 23, 2011 http://exchangeserverpro.com/exchange-server-2010-pop3/ by Paul Cunningham 6 Comments Exchange Server 2010 includes support for POP3 remote access to email. The POP3 service for Exchange Server 2010 runs on the Client Access server http://serverfault.com/questions/575553/exchange-use-port-110-for-both-pop3-pop3-ssl role. However POP3 is not enabled automatically on Exchange 2010 servers, and will require some initial setup and configuration before you can use it in your environment. exchange 2010 POP3 is disabled by default because it can be an insecure email protocol when it has not been configured properly. The default POP3 port (TCP 110) transmits traffic, including authentication traffic, in clear text. This in effect means that the usernames and passwords of your Exchange 2010 mailbox users could easily be compromised in exchange 2010 pop situations where users are connecting over insecure networks (eg public wireless networks). Understanding POP3 for Email Remote Access POP3 is the current version of the Post Office Protocol for email retrieval. It is one of the most common internet protocols for email retrieval (along with IMAP) and is probably familiar to anyone who has used an ISP email account in the last decade. POP3 is also supported by major email service providers such as Hotmail, Yahoo and Gmail. POP clients can be configured to retrieve mail one of two ways: Download email to the client and then delete from the server Download email to the client and then leave a copy on the server The first one is most common among home users because ISPs tend to have very small mailbox size limits that are no good for long term email storage. However the second method makes sense in environments where email is being read from multiple locations and the user w
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Exchange: use Port 110 for both POP3 & POP3/SSL? up vote 0 down vote favorite On our Exchange 2010 POP3 is configured to only allow secure logon (TLS connection for authentification). Now, the default port for "plain" POP3 is 110, and for POP3 with SSL is 995, hence with the given Exchange settings POP3 works only with SSL on 995, currently. Additionally, the Exchange server passes through some requests to another email server, who accepts "plain text" authentification. Therefore, port 110 works in this case. Suppose port 995 was blocked or can't be used for any reason, is it possible to configure Exchange to use both (unsecure POP3 and POP3 over SSL) on port 110? I tried to do this, but it didn't work (error "SSL authentification failed due to unexpected packet format" / "server doesn't accept encryption type"): TLS or unencrypted - IPv4: 110 - IPv6: 110 SSL - IPv4: 995 - IPv6: 955 - IPv4: 110 <-- I've added this I feel I still don't fully understand this. exchange-2010 port tls pop3 share|improve this question edited Feb 14 '14 at 9:55 asked Feb 14 '14 at 9:38 marsze 275513 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote Exchange already will use both secured and unsecured POP3 on port 110, as most modern POP3 servers do. Modern clients will use TLS for encryp