<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 9, 2017 at 11:11 AM, Rob Funk <span dir="ltr"><<a href="mailto:rfunk@funknet.net" target="_blank">rfunk@funknet.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div id="gmail-:42t" class="gmail-a3s gmail-aXjCH gmail-m15a23a5e354ab400">But when I send a message<br>
directly to Gmail, the DKIM signature is valid. If there's something I can<br>
do on my end to make the list not break DKIM I'm all ears.</div></blockquote></div><br><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small;color:rgb(51,0,51)">Rob,</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small;color:rgb(51,0,51)"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small;color:rgb(51,0,51)">DKIM is explicitly designed to ensure the authenticity of a mail sender to the mail recipient. Sending a message through a mailing list manager which, among other things, adds a footer, adds extra headers, and so on, does tend to invlalidate the DKIM signatures, and that's not entirely seen as an incorrect outcome. It "should" invalidate it because technically, the message has (although innocently) been altered. I have not read the entire RFC on this, but this link:</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small;color:rgb(51,0,51)"><br></div><div class="gmail_default"><font color="#330033" face="verdana, sans-serif"><a href="https://tools.ietf.org/html/rfc6377">https://tools.ietf.org/html/rfc6377</a></font><br></div><div class="gmail_default"><font color="#330033" face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font color="#330033" face="verdana, sans-serif">...it contains best practices for DKIM and Mailing Lists.</font></div><div class="gmail_default"><font color="#330033" face="verdana, sans-serif"><br></font></div><div class="gmail_default"><span style="color:rgb(51,0,51);font-family:verdana,sans-serif">Angelo</span><br></div><div class="gmail_default"><font color="#330033" face="verdana, sans-serif"><br></font></div><div class="gmail_default"><font color="#330033" face="verdana, sans-serif"><br></font></div></div></div>