<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">On Sep 1, 2015, at 8:35 AM, Patrick Boutilier &lt;<a href="mailto:boutilpj@ednet.ns.ca" class="">boutilpj@ednet.ns.ca</a>&gt; wrote:</div><br class="Apple-interchange-newline"><div class="">On 09/01/2015 12:26 PM, Paul van der Vlis wrote:<br class=""><blockquote type="cite" class="">Hello,<br class=""><br class="">Since yesterday I get phone calls from Apple users about port 993 not<br class="">working anymore. Some other users don't have problems using port 993.<br class=""><br class="">No problems on port 143 with starttls.<br class=""><br class="">I've tested it myself on Linux, same problem.<br class="">Starttls works, but SSL/TLS does not.<br class=""><br class="">I think it has to do with security problems in the SSL-protocol, and<br class="">updates in mailclients. Is here someone who knows more?<br class=""><br class="">My mail setup is a bit old (Debian Squeeze), I am testing a new setup at<br class="">the moment with Debian Jessie.<br class=""><br class="">With regards,<br class="">Paul van der Vlis.<br class=""><br class=""><br class=""><br class=""></blockquote><br class="">What version of Cyrus?<br class=""><br class=""><span id="cid:B7D8C7F4-FA72-42C8-AFE8-779207DE366A">&lt;boutilpj.vcf&gt;</span>----<br class="">Cyrus Home Page: <a href="http://www.cyrusimap.org/" class="">http://www.cyrusimap.org/</a><br class="">List Archives/Info: <a href="http://lists.andrew.cmu.edu/pipermail/info-cyrus/" class="">http://lists.andrew.cmu.edu/pipermail/info-cyrus/</a><br class="">To Unsubscribe:<br class=""><a href="https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus" class="">https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus</a></div></blockquote></div><br class=""><div class=""><br class=""></div><div class="">Ran into a similar problem when users upgraded to OS X 10.10.4 on the SMTP side of the equation. Perhaps you are running into it on the IMAP side??</div><div class=""><br class=""></div><div class="">Apple (as Apple does often) simply changed implementation (without much notice) no longer excepting “weak”&nbsp;public&nbsp;key exchange. In order for Mail.app to work you need to use a Diffie–Hellman key greater than 1024. I switched ours to 2048 just to be safe.&nbsp;</div><div class=""><br class=""></div><div class="">However, we never had issues with IMAP only SMTP.</div><div class=""><br class=""></div><div class="">Discussions:</div><div class=""><a href="https://discussions.apple.com/thread/7104500" class="">https://discussions.apple.com/thread/7104500</a></div><div class=""><a href="https://discussions.apple.com/thread/7105583" class="">https://discussions.apple.com/thread/7105583</a></div><div class=""><br class=""></div><div class="">Solutions was found:</div><div class=""><a href="https://discussions.apple.com/thread/7104500?start=60&amp;tstart=0" class="">https://discussions.apple.com/thread/7104500?start=60&amp;tstart=0</a></div><div class=""><br class=""></div><div class="">Hope this helps :)</div></body></html>