When you first turn on the device try turning off WiFi and turning back
on.  I think it is a WiFi bug with Android.  At least it is on my device,
when it is off WiFi doesn't always work at first.  If I wait long enough it
will eventually auto correct.  I think the screen saver has to kick in for
this bug to happen.  I've been looking for a fix and haven't found one yet.

At any moment, you have a choice, that leads you closer to God or further
from God.

"And ye shall know the truth, and the truth shall make you free."  John
8:32, KJV.
"Jesus saith unto him, I am the way, the truth, and the life: no man cometh
unto the Father, but by me."  John 14:6, KJV.
"Sanctify them through thy truth: thy word is truth."  John 17:17, KJV.
"He that saith, I know him, and keepeth not his commandments, is a liar,
and the truth is not in him."  1 John 2:4, KJV.


On Mon, Feb 11, 2019 at 11:54 PM Ron Or <[email protected]> wrote:

> I've seen a similar (and perhaps related) behavior. I'm sitting at my desk
> connected to wifi. My desktop will get the email (in this case, all my
> accounts are still POP), but the app will not. I take my dog for a walk or
> drive away and leave wifi range the app will then receive/retrieve the
> email. Similarly, an email will show up when I return home and connect to
> wifi. I have had it receive emails while out which suggests changing cells
> will also trigger the retrieval.
>
> On Saturday, February 9, 2019 at 7:44:22 PM UTC-5, Greg Troxel wrote:
>>
>> I have been seeing some odd behavior and I wonder if there is a bug open
>> or if others are seeing it.
>>
>> The facts:
>>
>>   phone (latest f-droid version of k-9) which normally works entirely
>>   fine wifi/cellular in terms of getting push mail (IMAP IDLE) from
>>   dovecot.  Phone is configured for push/idle and "poll when connecting
>>   for push".
>>
>>   phone travels away from wifi (and thus there is a messy period where
>>   wifi stops working and the cellular connection isn't up and being
>>   default, but that's normal)
>>
>>   phone therefore brings up cellular connection and k-9 starts to contact
>>   the imap server
>>
>>   right around this time, I believe an email is delivered
>>
>>   k-9 apparently connects and does not show the new message
>>
>>   a while later, maybe 20 minutes, when the phone switches to wifi
>>   (e.g. arriving someplace else), the message is shown as arrived
>>
>>   if a message is delivered well after the cellular connection (even
>>   30s), it is typically delivered ok
>>
>>   it seems that if another message happens to arrive some minutes later,
>>   often the non-notified message appears as well.
>>
>> My theory:
>>
>>   phone leaves wifi
>>
>>   phone connects to cellular
>>
>>   phone does poll (multiple mailboxes)
>>
>>   message arrives (after poll)
>>
>>   phone does IDLE and hence is not notified about the just-arrived
>>   message
>>
>> This theory is based on the push setup being after all the polls are
>> done.  It would seem to me that you'd have to set up IDLE first and then
>> poll to avoid this problem.  Of course, I could be totally off base, and
>> hence am asking if others have seen this first intead of spamming the
>> issue tracker.  But I really have noticed emails with missing
>> notifications, that I don't perceive as arrived for quite a while.
>>
>> Greg
>>
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