Hi raj. I am sending this mail from same mail system.SP u mean Service pack ? I loaded exch2k sp1 after noticing the problem, win2k is sp2. I am sending some NDR s b.bijub@xxxxxxxxx on 1/2/2002 4:53 PM Could not deliver the message in the time limit specified. Please retry or contact your administrator. prasad.cp on 1/2/2002 6:26 PM Your mail system could not find a way to successfully communicate with the destination system. Please notify your administrator. <excheit.emcureinfotech.com #5.5.0> Sukesh.N on 1/2/2002 6:26 PM Your mail system could not find a way to successfully communicate with the destination system. Please notify your administrator. <excheit.emcureinfotech.com #5.5.0> This are some warning messages in server event viewer. Application log. EXPS is temporarily unable to provide protocol security with "sohm.kpit.com". "CSessionContext::OnEXPSInNegotiate" called "HrServerNegotiateAuth" which failed with error code 0x8009030c ( N:\transmt\src\smtpsink\exps\expslib\context.cpp@1414 ). Message delivery to the remote domain 'rediffmail.com' failed for the following reason: The connection was dropped by the remote host. Message delivery to the remote domain 'hotmail.com' failed. The error message is 'An SMTP protocol error occurred. '. The SMTP verb which caused the error is 'RCPT'. The response from the remote server is '552 Requested mail action aborted: exceeded storage allocation '. Is this related to any security, authentication settings in server, or some related to relay,?? we are using DNS lookup only Expecting reply Regards Arif -----Original Message----- From: Periyasamy, Raj [mailto:psraj@xxxxxxxxxxxx] Sent: Wednesday, January 02, 2002 7:01 PM To: [ExchangeList] Subject: [exchangelist] RE: outbound mails problem http://www.MSExchange.org/ Hello Arif, Sorry, Just came to office today after holidays. If the problem is happening to only some domains, it could be a problem with the DNS resolution at VSNL, or even may be a problem with the routing path from VSNL to the problem domains. The best thing to do is, if the message is bouncing back with NDR message, check from which server the message is bouncing. Then you should request the VSNL to trace the message path to see why it is failing delivery. Sometimes such problems occur with ISPs. The browsing of Hotmail and Yahoo is working because, you access the HTTP servers for browsing. But the problem seems to be with the MX servers of these domains. Do you have a copy of the NDR, send to me if you have. Regards, Raj -----Original Message----- From: Arif, Aboo M [mailto:Aboo@xxxxxxxxxxxxxxxxxx] Sent: January 02, 2002 5:40 AM To: [ExchangeList] Subject: [exchangelist] RE: outbound mails problem http://www.MSExchange.org/ Hi raj I am expecting your reply, I hope I have given all information for previous query. Regards Arif -----Original Message----- From: Periyasamy, Raj [mailto:psraj@xxxxxxxxxxxx] Sent: Tuesday, January 01, 2002 11:46 PM To: [ExchangeList] Subject: [exchangelist] RE: outbound mails problem http://www.MSExchange.org/ Are you using SMTP relay or DNS lookup for mail delivery? What kind of connection do you have, DSL, T1, Dialup? -----Original Message----- From: Aboo Arif [mailto:aboo@xxxxxxxxxxxxxxxxxx] Sent: Tuesday, January 01, 2002 7:44 AM To: [ExchangeList] Subject: [exchangelist] outbound mails problem http://www.MSExchange.org/ My exchange server is not sending outside mails.While i tried diagnostic logging i got event viewer warning Like This "Message delivery to the remote domain 'hotmail.com' failed for the following reason: The connection was dropped by the remote host." But some other remote addresses are going without any delay.problem started from yesterday 31-12-01. Server DNS resolution is working fine. I am able to recieve mails and send mails to some outside addresses.But problem with some addresses like, hotmail.com, yahoo.co.in, etc. I spoke to our ISP regarding any type of blocking from their end and they said there is no problem.Internet browsing is working fine for all sites. any one have any sugestion on on this. regards Aboo Arif ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: psraj@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: aboo@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: psraj@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: aboo@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')