Yahoo Mail Only Syncs Manually

[JohnInPortland]

I have been using Aqua Mail Pro for about three months and love it.  Recently though, I found that my Yahoo mail account and my Frontier mail account (which I believe is managed by Yahoo Mail) will not synchronize except when I enter the Aqua Mail application and go to the Inbox (either Yahoo Inbox, Frontier Inbox or Smart Inbox). 

I have the settings for Yahoo Mail & Frontier Mail both configured as follows:
Account Options:
Include in scheduled checks
Include in Sync ALl

IMAP Other:
IMAP Push Session Duration = 1 hour

Folders:
Sync only Inbox

Mail, Receiving:
Special Settings is checked
Mail Sync Interval = 5 minutes
Custom Check Interval = Not specified

The mail synchronization in Aqua Mail used to work just fine for me for these two accounts until early December.  Since then I can only synchronize manually by entering the Aqua-Mail application.  However, my GMail account (Push mail) synchronizes perfectly through Aqua Mail.

I'm using a Samsung Galaxy S4 on Verizon in the USA running Android 4.3 (SU4).  This is a stock phone, not rooted or modified in any way.

Can you help me please?

John

[Kostya Vasilyev]

Hello,

So I take it, that refreshing the account / folder using those refresh buttons, etc. works fine?

Yahoo does not support IMAP IDLE, so that's out. Frontier is Yahoo indeed.

Since GMail works:

- Account options -> include in scheduled checks should be enabled, I see that it is, so that's good

- Global app settings -> mail, receiving -> scheduled checking should also be enabled

The "scheduled mail checking" in global app settings and per-account "cascade" with one another.

[JohnInPortland]

You wrote:

"- Global app settings -> mail, receiving -> scheduled checking should also be enabled

The "scheduled mail checking" in global app settings and per-account "cascade" with one another."

That fixed my problem.  For some reason, "scheduled checking" was not turned on.  Now it is and it works.  THANK YOU!