Inspecting the logs reveals that the message is delivered to the MBX server in its entirety - subject line fully intact. But, when you try to retrieve it you get a truncated subject line. It appears that Exchange stores the message with a 255 character limit imposed.
I have tried 2 different POP3 clients as well as IMAP and the results are always the same - 255 character limit. Carl Rimmel -----Original Message----- From: Ben Scott [mailto:mailvor...@gmail.com] Sent: Tuesday, July 14, 2009 4:45 PM To: MS-Exchange Admin Issues Subject: Re: Changing Subject Line Limits On Tue, Jul 14, 2009 at 11:32 AM, Micheal Espinola Jr<michealespin...@gmail.com> wrote: > Readability of such long subject line is difficult if not impossible > for many mail readers. Between BASE64 encoding overhead, UTF-8 encoding overhead, Unicode codepoints > 255, and combining characters (character modifiers), a single displayed glyph might well occupy several octets. In the pathological case, I think 255 octets could be only 23 displayed glyphs[1]. The pathological case isn't going to happen in reality, but it illustrates the point: You're assuming octets == glyphs, and that's very wrong for the encoded subjects the OP is seeing. I would follow MBS's suggestion, use SMTP logging or a packet sniffer to see if the problem is actually before Exchange or not. I would also try a different mail client, accessing Exchange with IMAP. This could be an issue in Outlook, or even a MAPI protocol limitation. [1] Assume we're dealing with U+10000 and up. That's 4 octets per Unicode character in UTF-8. Assume *every* character is modified. That's 8 octets per displayed glyph. Assume BASE64 overhead of 1.37. That's approximately 10.96 octets per glyph. 255 / 10.96 = 23 and change. -- Ben ============================================================================== CONFIDENTIALITY NOTICE: This email contains information from the sender that may be CONFIDENTIAL, LEGALLY PRIVILEGED, PROPRIETARY or otherwise protected from disclosure. This email is intended for use only by the person or entity to whom it is addressed. If you are not the intended recipient, any use, disclosure, copying, distribution, printing, or any action taken in reliance on the contents of this email, is strictly prohibited. If you received this email in error, please contact the sending party by reply email, delete the email from your computer system and shred any paper copies. Note to Patients: There are a number of risks you should consider before using e-mail to communicate with us. See our Privacy Policy and Henry Ford My Health at www.henryford.com for more detailed information. If you do not believe that our policy gives you the privacy and security protection you need, do not send e-mail or Internet communications to us. ==============================================================================
