Samsung Galaxy Tab 4 Mail issue

[Jorge V1]

HI

Im unable to see my POP3 account on my Tab 3 , the account already configured succesfully but the e-mails appears for a seconds then disappear, im able to see my e-mail using the same configuration on another devices line laptops and phones, the strangest thing is that im able to send e-mail but im unable to see all the emils i have on this account

Thank you