dovecot - Jun 2020 - Apple mail works but thunderbird unable to connect

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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make sure ports are set correctly in IPtables as it seems to be failing 
on TLS/SSL (open port 993)

Mark

On 6/22/2020 12:19 PM, Dshah wrote:
> 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 <http://master.cf>"
> https://pastebin.com/M3XG9DXA
>
> Thanks in advance.
>
>
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Thanks Mark,

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:
https://pastebin.com/M3XG9DXA


On Mon, Jun 22, 2020 at 7:36 PM Mark Stevens <manager at monmouth.com>
wrote:
>
> make sure ports are set correctly in IPtables as it seems to be failing on
> TLS/SSL (open port 993)
>
> Mark
>
> On 6/22/2020 12:19 PM, Dshah wrote:
>
> 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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Am 22.06.2020 um 18:19 schrieb Dshah:
> 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"
That error indicates to me that you are connecting to the MTA and not 
dovecot.. EHLO ist from the SMTP command set.

Alexander

On 22 Jun 2020, at 10:19, Dshah <divxtamana at gmail.com>
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"
Mozilla Thunderbird is misconfigured. Double check all your server names and
ports in Thunderbird?s config.

You should never send an EHLO from a MUA.

On 2020-06-22 3:16 p.m., @lbutlr wrote:
> You should never send an EHLO from a MUA.
???

The MUA needs to send an EHLO to an MTA, it's how it finds out what the 
server supports.. I think this is a problem with configuration, but the 
this isn't really dovecot related, so probably doesn't belong on this
list.

I might suggest that different email clients might respond differently 
to an advertisement of PIPELINE, so he probably should turn pipelining 
off in the MTA.. And start from there..


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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

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 at 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
>
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Am 23.06.2020 um 07:33 schrieb Bernardo Reino:
> 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
No, submitting on SMTP port 25 would be the wrong step. There's 
submission on port 587 or submissions (formerly called smtps) on port 
465 for taking MUA requests authenticating and submitting a message.

Alexander