If your running Exchange 2000 and I assuming this, you need the Firewall Software/Hardware to allow ESMTP protocol traffic for Messaging to flow.
----- Original Message ----- From: "Robert Williams" <[EMAIL PROTECTED]> To: "Exchange Discussions" <[EMAIL PROTECTED]> Sent: Monday, October 21, 2002 1:32 PM Subject: Need help with "550 5.7.1 Bad recipient format -- possible relay attempt" error > Can anyone tell me what to do here? > I just installed a Symantec Velociraptor firewall. > > Here is the message my firewall is showing, (I removed the original email > addresses to protect the innocent) > > smtpd Warning: Sender <[EMAIL PROTECTED]> SIZE=2844 from [207.114.164.37] > tried to send to '<[EMAIL PROTECTED]> NOTIFY=FAILURE,DELAY > ORCPT=rfc822;<[EMAIL PROTECTED]>' - 550 5.7.1 Bad recipient format -- > possible relay attempt > > > In my smpt protocol settings on the firewall I have the following choices: > of which only ESMTP is checked: > > > Enable ESMTP - Provides access to the Extended Simple Mail Transfer > Protocol. ESMTP is enabled by default. When it is enabled, the other > service extensions on this tab can be enabled. > > Enable AUTH (Authentication) - Allows client to send user name and password > to authenticate with the server. Authentication is enabled by default. > > Note: SEF/SEVPN does not support authentication mechanisms that result in > the connection being encrypted. > > Enable ATRN (Authenticated turn) - Allows an on-demand mail relay from the > server to the client by turning the existing connection around. ATRN is > disabled by default. > > Enable ETRN (Extended turn- Allows the client to access mail. In this case, > the server is requested to initiate a separate connection to the client for > the purpose of mail relay from server to the client. ETRN is disabled by > default. > > Enable EXPN (Expansion) - Allows for the expansion of mailing lists. EXPN is > disabled by default. > > Caution: Enabling this option exposes information about your internal > network to untrusted sites and is therefore not recommended. > > Enable VRFY (Verify) - Allows verification of mail addresses. VRFY is > disabled by default. > > Caution: Enabling this option exposes information about your internal > network to untrusted sites and is therefore not recommended. > > > Should I have any other of these options checked to allow these emails to > pass thru? > > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:leave-exchange@;ls.swynk.com > Exchange List admin: [EMAIL PROTECTED] > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:leave-exchange@;ls.swynk.com Exchange List admin: [EMAIL PROTECTED]
