I have already added 2 e-mail accounts to my main Gmail account for the purposes of regularly checking for e-mails on my main account. Both the accounts I added were from a different e-mail provider. I had absolutely no problem adding those 2 accounts from a different provider. Then, I tried to add another Gmail account for the same purpose and I keep getting the same message "Server denied POP3 access for the given username and password." I researched the problem and tried several different things I saw online but cannot seem to get it to work! In the meantime, I have gone into the other account I wish to download from and have used the mail forwarding function to receive the e-mails. It works, but I believe that sometimes there can be fairly long delays in receiving e-mails that way. It seems the pop server method is quicker more often.
Can anyone suggest how to rectify this problem?