Not sure if others are still around, but here is what I found: The connection being made is not to Exchange (Exchange does not answer like that) but instead to an SMTP proxy. http://messagewall.org/
Here is something I found on their site: "Will enabling 7bit mode really block mail? Many mail servers (MS Exchange 5.5 in particular) appear to support 8bit mail but do not advertise the 8BITMIME SMTP extension. Unfortunately, it is impossible to verify that they really do support 8bit mail; the only safe thing to do is block any mail that is not RFC-compliant. MessageWall does this, and *does* block legitimate mail. Many mail servers (qmail) always send 8bit, so mail from large sites (Hotmail) will have issues. The only way to solve the problem while maintaining security is to upgrade your backend server." My gut response is in their effort to stop spam, they go to far, even admitting they will block legit mail. John Tolmachoff Engineer/Consultant/Owner eServices For You > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:IMail_Forum- > [EMAIL PROTECTED] On Behalf Of David > Sent: Wednesday, November 26, 2003 3:43 PM > To: [EMAIL PROTECTED] > Subject: [IMail Forum] 7bit vs. 8bit mime > > This isn't necessarily an iMail issue, but I hope someone can help me with > it. I've looked in the KB, the Archive and didn't find anything that > related. And I read a lot of what I found on Google, but I still don't > really understand. :(( > > We have one client that has a problem sending mail to another mail server, > which is apparently an Exchange server, and the other mail server admin > maintains this is our problem. Which it certainly may be. The error > message that is created when the client sends his message is - > > <original error message> > An error was detected while processing the enclosed message. A list of > the affected recipient follows. This list is in a special format that > allows software like LISTSERV to automatically take action on incorrect > addresses; you can safely ignore the numeric codes. > > --> Error description: > Error-for: [EMAIL PROTECTED] > Error-Code: 0 > Error-Text: Mailer dilbert.iocenter.net said: > "501 MessageWall: SMTP/FATAL: Server sent an 8bit character to > a > 7bit server" > ...... > Error-End: 3 errors reported. > </original error message> > > The mail server admin for iocenter.net says we are not compliant with RFC > 1426 MIME handling http://www.faqs.org/rfcs/rfc1426.html. Additionally he > says...."Essentially, your SMTP server is attempting to > send data in 8-bit mode to our server. Our server is requesting the data > in 7-bit mode. Upon that request your server should convert the data to > 7-bit mode and resend, but your server is still sending in 8-bit mode. > You need to research MIME 8- to 7-bit conversion with your SMTP server. > There should be a flag/switch that you can configure." > > I've looked all over and haven't found anywhere to configure 7bit as an > option. The only 2 error message examples I have are from delivery > attempts > by gateway servers (originally LSMTP from LSoft and then with MS SMTP). > iMail is currently set to deliver remote mail through the gateway after 2 > attempts. But the logs from iMail (attached) show essentially the same > error. We handle tons of mail and this is the only case of this issue as > far as we know, and I haven't found a configuration options for 7bit mime > in > iMail or any of the other mail servers. Is the other mail server supposed > to announce "7bit mime" but isn't? Or is this RFC actually out of date, > or > not really generally accepted? > > I apologize for the long post. But hope someone can help. > > TIA, > > David > > http://www.orcsweb.com/ > Powerful Web Hosting Solutions > #1 in Service and Support 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/
