<div dir="ltr"><div dir="ltr">Thanks Mark, <div><br></div><div>I don't have iptables or other firewall block this port, it is behind a load balancer and port 993 is open. I am pretty sure it's something in my configuration which I linked above:</div><div><a href="https://pastebin.com/M3XG9DXA" target="_blank">https://pastebin.com/M3XG9DXA</a><br></div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 22, 2020 at 7:36 PM Mark Stevens <<a href="mailto:manager@monmouth.com">manager@monmouth.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
<div>
<div><br>
make sure ports are set correctly in IPtables as it seems to be
failing on TLS/SSL (open port 993)<br>
<br>
Mark<br>
<br>
On 6/22/2020 12:19 PM, Dshah wrote:<br>
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<div dir="ltr">Dear all,
<div><br>
</div>
<div>I am stuck on this issue for days, I am able to connect
on my IMAP server using Apple mail client but thunderbird
shows me this error: "improper command pipelining after
EHLO"</div>
<div><br>
</div>
<div>I have tried all the ports in manual config but it just
is not working while Apple Mail is able to connect
perfectly,</div>
<div><br>
</div>
<div>here are my configuration details of "postconf -n" ,
"doveconf -n" and "<a href="http://master.cf" target="_blank">master.cf</a>"</div>
<div><a href="https://pastebin.com/M3XG9DXA" target="_blank">https://pastebin.com/M3XG9DXA</a><br>
</div>
<div><br>
</div>
<div>Thanks in advance.</div>
<div><br>
</div>
<div><br>
</div>
</div>
</div>
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</blockquote></div>