Apple mail works but thunderbird unable to connect

[Dshah]

Dear all,

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"

I have tried all the ports in manual config but it just is not working
while Apple Mail is able to connect perfectly,

here are my configuration details of "postconf -n" , "doveconf -n" and "
master.cf"
https://pastebin.com/M3XG9DXA

Thanks in advance.
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