Hi all,

First I would like to Thank you all, it is such a responsive and wonderful community here.

I started to debug the issue by streaming logs and figured that EHLO was being sent when I click "Re-Test" button on thunderbird, another issue I encountered I was not able to connect ports 465/993, It was not blocked by firewall cause I could see live streaming logs, I think it's more on postfix side which I have sent for help.

here are my logs

https://pastebin.com/7xRHax4q

and config ( postfix, dovecot)

https://pastebin.com/M3XG9DXA

In case someone could help, I can pay a small amount for figuring out this issue.

Thanks again

On Tue, Jun 23, 2020 at 8:33 AM Bernardo Reino <reinob@bbmk.org> wrote:

On 22/06/2020 18:19, Dshah wrote:

> 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"

The problem is, AFAIK, Thunderbird's autoconfiguration. It tries to
detect your SMTP settings (note: SMTP, i.e. for mail sending, not for
receiving, which would actually involve dovecot), but does it violating
the protocol (does pipelining without waiting for confirmation).

https://bugzilla.mozilla.org/show_bug.cgi?id=832457

The bug is old and considered to be resolved. And nobody cares :(
If you use postfix a "workaround" is to temporarily disable postscreen,
which IIRC is the one (rightly) complaining about the improper pipelining.

Cheers,
Bernardo Reino