[cl-smtp-devel] [PATCH] Prevent sending of bare LFs that are rejected by qmail.

[Justin Megawarne]

  Hi, all.

  There is a problem when sending plain-text messages with newlines to qmail
  via CL-SMTP. Bare LFs should never be sent as newlines, but this is allowed
  through in some cases.

  http://cr.yp.to/docs/smtplf.html

  When CL-SMTP encounters a #\NewLine in the message body, it simply outputs it
  to the stream. On Linux, Mac, etc. these get turned into bare LFs.
  
  qmail rejects this non-compliant behaviour. It has a config setting called
  USE_FIXCRIO to transparently convert bare LFs into CRLFs. However, it would
  be much nicer if CL-SMTP sent the right thing, and, besides, magic fixing
  is prohibited by the RFC.

  Below is a patch that should resolve the problem. I have not had an
  opportunity to test on other MTAs.

? cl-smtp-fix-newline.patch
Index: cl-smtp.lisp
===================================================================
RCS file: /project/cl-smtp/cvsroot/cl-smtp/cl-smtp.lisp,v
retrieving revision 1.22
diff -r1.22 cl-smtp.lisp
114c114
<             (write-char c stream))
---
>             (write-blank-line stream))

-- 
Justin Megawarne
mailto:justin at megawarne.com
skype:jmegawarne?call

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