Serge, Since version 5.03, you can force IMail to send al outgoing mail from the primary IP/Domain by:
Adding the value (REG_DWORD) "BindToIP" in HKEY_LOCAL_MACHINE\SOFTWARE\Ipswitch\IMail\Global and assign a value of 0 (zero) Restart services, etc... Not sure about the HELO portion, but I assume since imail makes conenction out on the primary, the HELO would follow along. Regards, David Gregg dgSoft Internet Services Web hosting, Email outsourcing, Dedicated and shared infrastructure solutions. (949) 584-1514 ----- Original Message ----- From: "Serge" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, October 14, 2003 8:13 PM Subject: Re: [IMail Forum] PTR record for a virtual IP > Hi Len et al > This may be of interest to all Virtual Domains users > > Did some extensive testing on virtual domains (shared IP with the official > imail host) > > I came uo with 2 conclusions: > > 1- If the VD user do not authenticate, the smtp rdeliver ehlo will be the > official imail hostname. > but is the user does authenticate, the smtp ehlo will be mail.VD.com > therfore, when using virtual domains, it is going to be impossible to make > the PTR and Ehlo same (if you use authent.) > that is a problem for users like me with 50+ VD on the same IP > > All comments are wellcomed > > 2- More disturbing, when using VD authenticated users, the IP used to send > the mail is the primary NIC IP (which in my case different from the IP of > the iimail offficial host) I use .1 for the Primary NIC ip, .6 as a > secondary IP on the same NIC, and have binded Imail official host to .6 > works fine for official host, but all VD attached to the official host are > using .1 instead of .6 to send mail (for VD authenticated users) > isn't this a bug ? > When i configure a VD to use the IP of the official host, shouldn't it > always do that ? > > Comments ? > > > > ----- Original Message ----- > From: "Len Conrad" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Saturday, October 11, 2003 8:58 PM > Subject: Re: [IMail Forum] PTR record for a virtual IP > > > > > > >Let me rephrase my question > > >when a user on a virtual domain domain2.com send an email via the server > > >host domain1.com, will smtp identify itself as Domain1.com or > Domain2.com? > > > > I looked up this "Imail helo's as" in the u/g and kb, and couldn't find > for > > sure (esp since it's an important point), but I think I remember an answer > > in this list from Ipswitch person that Imail helo's with the > > default/canonical hostname for a given IP. > > > > >does the answer depends on whether the user authenticated or not ? > > > > I would say no. there's no correspondance. Imail SMTPD > > greets+authenticates, but it's IMail SMTP that sends. Imail doesn't > change > > it's HELO hostame to match every outbound @sender.domain it sends. eg, > > what about users who send through IMail using a domain that is not even an > > Imail domain, real or virtual? > > > > >If the answer is Domain1.com, then the "from" [EMAIL PROTECTED], will be > > >different from the ehlo/smtp/PTR > > >Is that tested by some servers ? > > > > Sure. > > > > eg, to prevent common forgeries of the helo hostname using the domains of > > BigISP (yahoo, hotmail, etc), IMGate can do this logic: > > > > if helo is /BigISP/, then PTR must be /BigISP/. > > > > if sender.domain is /big ISP/, then PTR must be /BigISP/ > > > > if PTR is /BigISP/, then sender.domain must be /BigISP/ > > > > etc, etc. > > > > >can it be a problem ? > > > > not in general. > > > > As I said, the ptr/helo/smtp-greet hostname is identified with the > physical > > machine and its IP address, independent of the (virtual) envelope > > sender/recipient domains the machine emits/receives. > > > > There is no required correspondence between a domain's MX hostname and PTR > > of IP it resolves to. > > > > somedomain.com MX 10 mx.whatever.com. > > > > but somedomain.com is not involved in matchup of: > > > > mx.whatever.com. A A.B.C.D > > > > D.C.B.A.in-addr.arpa PTR mx.whatever.com. > > > > And then the MTA at IP A.B.C.D : > > > > SMTP-greets as mx.whatever.com > > > > HELOs as mx.whatever.com > > > > > > Len > > > > _____________________________________________________________________ > > http://MenAndMice.com/DNS-training: Wash DC; Dallas; Atlanta > > IMGate.MEIway.com: anti-spam gateway, effective on 1000's of sites, free > > > > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > > List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > > > > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
