steve@mrc-apu.cam.ac.uk (Steve Platt) (03/14/90)
I think I asked this before, but I can't remember if an answer came over... In UK-sendmail 1.4a, there was a rule that said :- | R$+ at $+ $1@$2 " at " -> "@" for RFC 822 The problem is that sendmail/lib/usr/ (pathname in WORLD ORDER!) seems to be no respecter of spaces and although the above line does work as intended; translating addresses like "user at site" into "user@site"; it also has the side effect of translating "user@AT.site" (Austria) into "user@@.site" (nowhere much use!). In UK-Sendmail 2.1, an attempt to get round this is to escape the spaces:- | R$+\ at\ $+ $1@$2 " at " -> "@" for RFC 822 Although this prevents the "AT" domain getting translated it also prevents the "user at site" translation from occuring, as far as I can see. Obviously the same result could be obtained by deleting the rule! SO did someone get it working, perhaps on a different sendmail? Should anyone worry (I assume that the " at " use is uncommon these days)? This is all with sunos 4.0.3's own sendmail. Many thanks for any (possibly repeated) attention you are giving this one. Steve platt
parmelee@wayback.cs.cornell.edu (Larry Parmelee) (03/14/90)
The "at" -> "@" translation is a pretty old, no longer current standard, and generally a Bad Thing to do on the Internet these days. Drop it if at all possible. If you MUST support this translation, about the only safe way to do it is to define a Class consisting of all the mail punctuation characters, and change only those "at"s which are not preceeded or followed by one of the punctuators. Define a class "P" of all the punctuation characters: CP. : % @ ! ^ = / [ ] Using class "P", translate "at"s: R$*$~Pat$~P$* $1$2@$3$4 -Larry Parmelee parmelee@cs.cornell.edu