Pop3 Err Protocol Error 16
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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 Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up POP3 netcat protocol error up vote 0 down vote favorite I tried to connect to my POP3 school server https://social.technet.microsoft.com/Forums/en-US/1cbddb5d-3484-4c0c-a954-33845373e77f/exchange-2010-pop3-security-issue-command-is-not-valid-in-this-state?forum=exchangesvrsecuremessaginglegacy as part of my assignment. Now, I can connect to the server but the real problem is when I try to log in using the "USER" command. c:/>nc server.pop3.com 110 +OK Microsoft Exchange Server 2003 POP3 server version 6.5.7638.1 (server.pop3.com) ready. USER myuserid -ERR Protocol error Now I'm wondering whether there's an issue on my side or on the server? Thank you for the time and answers. pop3 netcat share|improve this question http://stackoverflow.com/questions/2433574/pop3-netcat-protocol-error asked Mar 12 '10 at 15:04 user292419 add a comment| 2 Answers 2 active oldest votes up vote 1 down vote Exchange expects a CRLF as line termination. Use netcat -C servername pop3 share|improve this answer answered Jun 10 '11 at 8:31 Dr. Tilo Levante 111 add a comment| up vote 0 down vote Use CAPA command just after connection. You'll see what login mechanisms are supported. Exchange usually does not allow clear text mechanisms. Most likely you'll be forced to use SSL+plain text, or APOP login mechanism. share|improve this answer edited Apr 16 '10 at 10:20 answered Apr 16 '10 at 10:03 Pawel Lesnikowski 4,82132735 I'm having the same problem as the original poster. Trying CAPA as the first command also gives '-ERR Protocol error'. –Andreas Jansson May 13 '10 at 11:57 Try connecting using SSL. –Pawel Lesnikowski May 13 '10 at 16:58 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. asked 6 years ago viewed 1167 times active 5 years ago Relate
for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time https://www.experts-exchange.com/questions/28083232/Can't-get-e-mail-via-POP3-Exchange-2010.html Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > Can't get e-mail http://forums.msexchange.org/POP3_-_Protocol_error%25_19/m_1800442590/tm.htm via POP3 Exchange 2010 Want to Advertise Here? Solved Can't get e-mail via POP3 Exchange 2010 Posted on 2013-04-01 Exchange 1 Verified Solution 16 Comments 3,377 Views Last Modified: 2013-04-04 I'm trying to protocol error set up a new exchange server and have everything configured to send e-mail and receive through outlook web access and standard exchange access. However I can't get the email through POP3. I've enabled the service, added firewall rules. If I set up the account in outlook for POP3 access and do the "Test Account Settings" "Log onto incoming mail server (POP3)" shows as completed as if it pop3 err protocol works. Once I close this, and do a send/receive I get the following error. Task 'email@....net - Receiving' reported error (0x800CCC90) : 'Your incoming (POP3) e-mail server has reported an internal error. If you continue to receive this message, contact your server administrator or Internet service provider (ISP). The server responded: -ERR Server Unavailable. 21' 0 Question by:zer0zer0 Facebook Twitter LinkedIn Google LVL 10 Active 3 days ago Best Solution bycpmcomputers Try from a simple command prompt it seems there is a known issue with putty and exchange 2010 Is your internal domain in the format mydomain.local or my domain.com I take it that it is added Go to Solution 16 Comments LVL 6 Overall: Level 6 Exchange 1 Message Expert Comment by:RaithZ2013-04-01 Do you have the pop3 connector set to require ssl or tls? 0 LVL 10 Overall: Level 10 Exchange 5 Message Active 3 days ago Expert Comment by:cpmcomputers2013-04-02 Pop3 on exchange 2010 does not allow basic password connections by default You can change it but it is considered a security risk To prove if this is your problem If you telnet the server internally Ie telnet serverip 110 You will get a message
| My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out POP3 - Protocol error. 19 Users viewing this topic: none Logged in as: Guest Tree Style Printable Version All Forums >> [Microsoft Exchange 2007] >> Management >> POP3 - Protocol error. 19 Page: [1] Login Message << Older Topic Newer Topic >> POP3 - Protocol error. 19 - 6.Jun.2007 6:30:48 PM techboy Posts: 2 Joined: 6.Jun.2007 Status: offline For a test situation, we are attempting to disable SSL for the POP3 service in Exch 2007. I've set the LoginType to PlainTextLogin but when I telnet to ther server from an external IP, I get an error after entering Login: -ERR Protocol error. 19 I cannot seem to fund much documentation on what this error means. POP3 works fine internally. We have configured ISA 2004 rule to point port 110 to the exchange 2007 server. Below is the return from the get-POPSettings cmdlet. Name : 1 ProtocolName : POP3 MaxCommandSize : 40 MessageRetrievalSortOrder : Descending UnencryptedOrTLSBindings : {0.0.0.0:110} SSLBindings : {0.0.0.0:995} X509CertificateName : mail.foobar.com Banner : Microsoft Exchange Server 2007 POP3 service ready LoginType : PlainTextLogin AuthenticatedConnectionTimeout : 00:30:00 PreAuthenticatedConnectionTimeout : 00:01:00 MaxConnections : 2000 MaxConnectionFromSingleIP : 2000 MaxConnectionsPerUser : 16 MessageRetrievalMimeFormat : BestBodyFormat ProxyTargetPort : 110 CalendarItemRetrievalOption : iCalendar OwaServerUrl : MinAdminVersion : -2147453113 AdminDisplayName : ExchangeVersion : 0.1 (8.0.535.0) DistinguishedName : CN=1,CN=POP3,CN=Protocols,CN=mail,CN=Serv ers,CN=Exchange Administrative Group (FYDIB OHF23SPDLT),CN=Administrative Groups,CN=Acme Technology Corporation,CN=MicrosoftExchange,CN=Services, CN=Configuration,DC=foobar,DC=com Identity :MAIL\1 Guid : ba78b640-398d-4d71-8bbc-2df4b48fc28a ObjectCategory : foobar.com/Configuration/Schema /ms-Exch-Protocol-Cfg-POP-Server ObjectClass : {top, protocolCfg, protocolCfgPOP, protocol
CfgPOPServer} WhenChanged : 6/6/2007 2:04:52 PM WhenCreated : 5/29/2007 2:06:59 PM OriginatingServer : GC.FOOBAR.com IsValid : True Any ideas? Thanks! < Message edited by techboy -- 6.Jun.2007 6:33:25 PM > Post #: 1 Featured Links* RE: POP3 - Protocol er