Check the DNS setting for the mail server. Log on to the mailserver locally and check the mx records of a domain you cannot send by nslookup. Also try to send a mail manually from telnet to the remote mail server and check if it arrives. -----Original Message----- From: sboticario [mailto:sboticario@xxxxxxxxxxxxx] Sent: Thursday, April 24, 2003 8:15 PM To: [ExchangeList] Subject: [exchangelist] Send emails to other domains http://www.MSExchange.org/ Hi, I have problems to send email to others domains, (yahoo; hotmail; etc..). I only can send email to my domain of my company and of my ISP... I receive the next error:Message delivery to the remote domain 'yahoo.com' failed for the following reason: The connection was dropped by the remote host. I have one server with ISA Server and SMTP Service runs and other server with only exchange that connect to the SMTP Server. But this server don't forward to the correct domain (yahoo, hotmail, etc..) Thank's a lot ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: robert@xxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') This mail was content-checked for malicious code and viruses by GFI MailSecurity. GFI MailSecurity provides email content checking, exploit detection and anti-virus for Exchange & SMTP servers. Spam, viruses, dangerous attachments and offensive content are removed automatically. Key features include: Multiple virus engines; Email content & attachment checking; Exploit shield - email intrusion detection & defence; Email threats engine - analyses & defuses HTML scripts, .exe files & more. In addition to GFI MailSecurity, GFI also produces the GFI FAXmaker fax server & GFI LANguard network security product ranges. For more information on our products, please visit http://www.gfi.com. This disclaimer was sent by GFI MailEssentials for Exchange/SMTP.