Why isn't my second Yahoo mail on my Lumia 630 not working well?

[Windows Central Question]

my second yahoomail on my lumia 630 not working well

It keeps on synchronising and running down the battery.
The phone is hot

 

[gpobernardo]

Re: my second yahoomail on my lumia 630 not working well

It keeps on synchronising and running down the battery.
The phone is hot

Check the sync settings and make sure that it's set to download mail only within a specific time frame, e.g. from the past two weeks. I suspect that it is trying to download your entire inbox which, if your YahooMail is like mine with over 80,000 emails, would take a really really really long time to finish.