Sam, when MAL wrote me about this bug I thought it was a sendmail idiosyncrasy. He found that a long display phrase makes the From: header wrapped. I checked several DKIM validators and found (only) one of them succeeded; that is, the From: line wasn't wrapped, like in local bcc's.
After further investigation I found out that Courier smtp client wraps header lines longer than 70 (rfc822_getaddrs_wrap). Sendmail unwraps the newline to work around a Lotus Notes quirk which used to cause some misbehavior in some clients. I'm not clear whether esmtpclient only wraps in some cases or Applemail (the server that hosts the succeeding test) does a better unwrapping by also removing the two additional spaces. All of that seems to be buried quite deeply in email history. If you recollect any details, I'll forward that to the folks at opendkim who helped me understanding this oddity. For outbound mail, the obvious workaround is to use the "relaxed" DKIM header canonicalization, which disregards whitespace. Some may prefer to skip the rewriting entirely, but I have no idea of the pros and cons of it. "Simple" canonicalization would be better in case whitespace matters. Is it worth making the rewriting configurable? For inbound mail, rewriting doesn't seem to take place. Correct? Ale ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ courier-users mailing list courier-users@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
