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<tt>I was able to pull some info from Censys:</tt><tt><br>
</tt><tt><br>
</tt>
<table cellspacing="0" border="0">
<colgroup width="74"></colgroup><tt> </tt><colgroup width="85"
span="14"></colgroup> <tbody>
<tr>
<td style="border-top: 1px solid #009353; border-left: 1px
solid #009353" height="20" bgcolor="#009353" align="left"><tt><b><font
size="3" color="#FFFFFF"><br>
</font></b></tt></td>
<td style="border-top: 1px solid #009353" colspan="2"
bgcolor="#009353" align="center"><tt><b><font size="3"
color="#FFFFFF">SMTP_tls 25</font></b></tt></td>
<td style="border-top: 1px solid #009353" colspan="2"
bgcolor="#009353" align="center"><tt><b><font size="3"
color="#FFFFFF">SMTPS 465</font></b></tt></td>
<td style="border-top: 1px solid #009353" colspan="2"
bgcolor="#009353" align="center"><tt><b><font size="3"
color="#FFFFFF">SMTPS 587</font></b></tt></td>
<td style="border-top: 1px solid #009353" colspan="2"
bgcolor="#009353" align="center"><tt><b><font size="3"
color="#FFFFFF">POP3_tls 110</font></b></tt></td>
<td style="border-top: 1px solid #009353" colspan="2"
bgcolor="#009353" align="center"><tt><b><font size="3"
color="#FFFFFF">POP3S 995</font></b></tt></td>
<td style="border-top: 1px solid #009353" colspan="2"
bgcolor="#009353" align="center"><tt><b><font size="3"
color="#FFFFFF">IMAP_tls 143</font></b></tt></td>
<td style="border-top: 1px solid #009353" colspan="2"
bgcolor="#009353" align="center"><tt><b><font size="3"
color="#FFFFFF">IMAPS 993</font></b></tt></td>
</tr>
<tr>
<td style="border-left: 1px solid #009353" height="20"
align="left"><tt><b><font size="3" color="#000000">TLSv1.2</font></b></tt></td>
<td align="right"><tt><font size="3" color="#000000">2942702</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">91.23%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">3461550</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">94.23%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">3519800</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">95.61%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">3506308</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">92.08%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">3744681</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">92.12%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">3638533</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">91.94%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">3869287</font></tt></td>
<td style="border-right: 1px solid #009353" align="right"><tt><font
size="3" color="#000000">92.64%</font></tt></td>
</tr>
<tr>
<td style="border-left: 1px solid #009353" height="20"
bgcolor="#DDDDDD" align="left"><tt><b><font size="3"
color="#000000">TLSv1.1</font></b></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">1281</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.04%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">1156</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.03%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">884</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.02%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">3947</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.10%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">3783</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.09%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">4200</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.11%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">4423</font></tt></td>
<td style="border-right: 1px solid #009353" bgcolor="#DDDDDD"
align="right"><tt><font size="3" color="#000000">0.11%</font></tt></td>
</tr>
<tr>
<td style="border-left: 1px solid #009353" height="20"
align="left"><tt><b><font size="3" color="#000000">TLSv1.0</font></b></tt></td>
<td align="right"><tt><font size="3" color="#000000">281350</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">8.72%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">210521</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">5.73%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">160651</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">4.36%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">297628</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">7.82%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">315010</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">7.75%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">314582</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">7.95%</font></tt></td>
<td align="right"><tt><font size="3" color="#000000">300889</font></tt></td>
<td style="border-right: 1px solid #009353" align="right"><tt><font
size="3" color="#000000">7.20%</font></tt></td>
</tr>
<tr>
<td style="border-left: 1px solid #009353" height="20"
bgcolor="#DDDDDD" align="left"><tt><b><font size="3"
color="#000000">SSLv3.0</font></b></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">401</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.01%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">304</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.01%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">25</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.00%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">74</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.00%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">1675</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.04%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">216</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">0.01%</font></tt></td>
<td bgcolor="#DDDDDD" align="right"><tt><font size="3"
color="#000000">2049</font></tt></td>
<td style="border-right: 1px solid #009353" bgcolor="#DDDDDD"
align="right"><tt><font size="3" color="#000000">0.05%</font></tt></td>
</tr>
<tr>
<td style="border-bottom: 1px solid #009353; border-left: 1px
solid #009353" height="20" bgcolor="#BEE3D3" align="left"><tt><b><font
size="3" color="#000000"><br>
</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="right"><tt><b><font size="3" color="#000000">3225734</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="left"><tt><b><font size="3" color="#000000"><br>
</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="right"><tt><b><font size="3" color="#000000">3673531</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="left"><tt><b><font size="3" color="#000000"><br>
</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="right"><tt><b><font size="3" color="#000000">3681360</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="left"><tt><b><font size="3" color="#000000"><br>
</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="right"><tt><b><font size="3" color="#000000">3807957</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="left"><tt><b><font size="3" color="#000000"><br>
</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="right"><tt><b><font size="3" color="#000000">4065149</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="left"><tt><b><font size="3" color="#000000"><br>
</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="right"><tt><b><font size="3" color="#000000">3957531</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="left"><tt><b><font size="3" color="#000000"><br>
</font></b></tt></td>
<td style="border-bottom: 1px solid #009353" bgcolor="#BEE3D3"
align="right"><tt><b><font size="3" color="#000000">4176648</font></b></tt></td>
<td style="border-bottom: 1px solid #009353; border-right: 1px
solid #009353" bgcolor="#BEE3D3" align="left"><tt><b><font
size="3" color="#000000"><br>
</font></b></tt></td>
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</tt><tt> I think a server only gets counted once on each port, so a
TLSv1.2 server doesn't also show up under TLS1.0 if it supports
multiple versions.</tt><br>
<br>
<div class="moz-cite-prefix">On 9/12/19 7:43 PM, Matt Harris wrote:<br>
</div>
<blockquote type="cite"
cite="mid:6be76be9-0a44-e38b-a61c-c13001e6b08b@gmail.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div class="moz-cite-prefix">On 12-Sep-19 11:34 PM, Kai Engert
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:b9746b94-3f1e-7676-9a07-d6a358f14c4b@kuix.de">
<pre class="moz-quote-pre" wrap="">On 12.09.19 14:40, Patrick Cloke wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">I'm curious what effect this will have on Thunderbird. Do we have any
idea what percentage of SMTP/IMAP/POP servers are using these versions
of TLS?
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">I don't have numbers.
My primary concern here is our inadequate communication of errors
related to SSL/TLS connectivity to the user.
</pre>
</blockquote>
<i>Undoubtedly the biggest issue for users is this sort of
failure. The errors do appear in the error console, but it is
so full of rubbish that any advice has to start with "clear the
console" and it is certainly no somewhere I like to point
users. Nothing like a support request that starts with a random
error console error<br>
<br>
Matt<br>
</i> <br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
tb-planning mailing list
<a class="moz-txt-link-abbreviated" href="mailto:tb-planning@mozilla.org">tb-planning@mozilla.org</a>
<a class="moz-txt-link-freetext" href="https://mail.mozilla.org/listinfo/tb-planning">https://mail.mozilla.org/listinfo/tb-planning</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Rob Lemley
Thunderbird Build Engineer
<a class="moz-txt-link-abbreviated" href="mailto:rob@thunderbird.net">rob@thunderbird.net</a> - :rjl</pre>
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