Cormack, Ken spake the following on 12/11/2006 1:57 PM: > Group, > > I'm googling through the RFCs trying to find this (mainly RFC821 and 822), > but perhaps one of you might be able to help narrow this down? It's not a > MIMEDefang question, per se, but we've got a customer trying to send us a > programmatically-generated email, that is being blocked by our gateways. > The arg being passed (to a sendmail rule that we have) indicates that the > HEADER "To:" line has incorrect syntax as follows: > > [EMAIL PROTECTED],[EMAIL PROTECTED],[EMAIL PROTECTED] > > Note the presence of commas, but and the absence of spaces, in the above. > > I'm guessing that spaces are needed, but would like to be able to reference > an RFC syntax quotation for the external developer, since both they and we > maintain nothing has changed. > > The particular sendmail rule we use is even older than our MIMEDefang > deployment here, (has been in service and untouched for approx 6 years now). > And I have a feeling the customer's program code has changed. Without > calling him a liar, I'd rather just be able to say "RFC such-and-such, > section blah-blah-blah says this..." > > Can anyone point me to a good reference on the structure of SMTP headers, > specifically the Header "To:" field, and the allowed syntax for multiple > recipients? > > Thanks! > > Ken > RFC822 paragraph 3.4.2 deals with whitespace. 3.4.4 deals with phrases and quoting, and the examples in the appendix clearly show a space after the comma in multiple fields in the "To:". Paragraph 3.1.1 also mentions the space or CRLF and space after a comma.
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