Matt, Thanks so much, your tip was really useful. But I think the problem has to be with the DNS. I have this following error message in my Event viewer Event Type: Warning Event Source: MSExchangeTransport Event Category: Connection Manager Event ID: 4000 Date: 7/1/2002 Time: 6:11:25 PM User: N/A Computer: OOH_LAG1 Description: Message delivery to the remote domain 'hotmail.com' failed for the following reason: Unable to bind to the destination server in DNS. Data: 0000: c00402d5 I really don't know what is wrong with the DNS records cos I updated them. I can hit on port 25 of Internet SMTP servers but I can surf the net. U have any suggestions or tip on this. Cos I'm really getting fusrated. --- "Walkowiak, Matt" <Matt.Walkowiak@xxxxxxxxxxxx> wrote: > http://www.MSExchange.org/ - Re-Vamped! > > > First thing, turn on SMTP logging - Servers --> > Server name --> > Protocols --> SMTP --> right-click on Default > SMTP... and enable > logging, and turn everything on. > > Then, pick your favorite SMTP server out on the > Internet and try and > "hit" it on port 25. > telnet mail.domain.com 25 > you should get a 220 response. > If you don't, make sure you can surf the internet. > If you get a 220 response, then you need to make > sure the domain name > you are sending from exists in an A record. If the > SMTP logs above, you > might see error messages saying "domain does not > exist" What some SMTP > servers out there do is bounce your request to send > back at you, to make > sure you are really a mail server. If they can't > see you, they reject > you. > > This kinda thing happened to me. (forgive my poor > composition skills if > this makes no sense :) > > In the setup of a mail server (Imail, not exchange) > it asks you what the > FQDN of the mail server should be. I entered > mail.domain.com. I never > did have an A record for mail.domain.com - I didn't > think I would need > it. What I did do was have the MX record for > domain.com point to > office.domain.com - basically the FQDN of my router. > SO... when I > would try and send a message, my mail server would > connect to the > receiving SMTP server fine, then do an HELO from > mail.domain.com. The > receiving SMTP server at some point tries to talk > back to > mail.domain.com to make sure it is actually a mail > server, but it looks > for an MX record of mail.domain.com, not just > domain.com - getting > nothing back, it believes that my server is bogus > and sends my packets > to the bit-bucket. > > In other words, I'd look hard at DNS and where > everything is pointing > to. > > Also look at those log files. > > Matt Walkowiak > > > > > -----Original Message----- > From: Olomo Opeyemi [mailto:hoppy_lumz@xxxxxxxxx] > Sent: Monday, July 01, 2002 2:19 AM > To: [ExchangeList] > Subject: [exchangelist] Problem with outbound mails > > http://www.MSExchange.org/ - Re-Vamped! > > > I have a problem with my exchange server. It all > started when my ISP changed my IP address and I had > to > reconfigure my DNS records and my router > configuration > to accomodate the chane. Initially my exchange was > working fine but all of a sudden all remote mails > started bouncing back. We can only send and receive > mails locally. We cannot send remote mails but we > can > receive them. > > I've checked System administrator to see if there is > any peculiarities but there seems to be none. > > Pls help. > > > __________________________________________________ > Do You Yahoo!? > Yahoo! - Official partner of 2002 FIFA World Cup > http://fifaworldcup.yahoo.com > > ------------------------------------------------------ > You are currently subscribed to this MSExchange.org > Discussion List as: > matt.walkowiak@xxxxxxxxxxxx > To unsubscribe send a blank email to > $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this MSExchange.org > Discussion List as: hoppy_lumz@xxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com