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copied!<p>First of all, this is a tricky task.</p> <p>You should collect typical responses from different e-mail clients and prepare correct regular expressions (or whatever) to parse them. I've collected responses from outlook, thunderbird, gmail, apple mail and mail.ru.</p> <p>I am using regular expressions to parse response in following manner: if expression did not matched, I try to use the next one.</p> <pre><code>new Regex("From:\\s*" + Regex.Escape(_mail), RegexOptions.IgnoreCase); new Regex("<" + Regex.Escape(_mail) + ">", RegexOptions.IgnoreCase); new Regex(Regex.Escape(_mail) + "\\s+wrote:", RegexOptions.IgnoreCase); new Regex("\\n.*On.*(\\r\\n)?wrote:\\r\\n", RegexOptions.IgnoreCase | RegexOptions.Multiline); new Regex("-+original\\s+message-+\\s*$", RegexOptions.IgnoreCase); new Regex("from:\\s*$", RegexOptions.IgnoreCase); </code></pre> <p>To remove quotation in the end:</p> <pre><code>new Regex("^>.*$", RegexOptions.IgnoreCase | RegexOptions.Multiline); </code></pre> <p>Here is my small collection of test responses (samples divided by <strong>---</strong> ):</p> <pre><code>From: test@test.com [mailto:test@test.com] Sent: Tuesday, January 13, 2009 1:27 PM ---- 2008/12/26 <test@test.com> > text ---- test@test.com wrote: > text ---- test@test.com wrote: text text ---- 2009/1/13 <test@test.com> > text ---- test@test.com wrote: text text ---- 2009/1/13 <test@test.com> > text > text ---- 2009/1/13 <test@test.com> > text > text ---- test@test.com wrote: > text > text <response here> ---- --- On Fri, 23/1/09, test@test.com <test@test.com> wrote: > text > text </code></pre> <p>Best regards, Oleg Yaroshevych</p>

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