No one uses POP any more. It’s so 20th century. Use IMAP instead.
The main difference is that POP assumes your email resides on your local system and downloads your emails there. By default POP deletes emails that are downloaded locally (although this can be changed). If you use multiple platforms, you’re going to run into trouble with emails not being sync’d between the various systems.
IMAP assumes that your server stores all emails including sent mails. They may be locally cached on your system, but the server state is what’s real.
POP was popular (no pun intended. Honest) when email servers had tiny amounts of space. I remember having to download emails on a daily basis over a 2400bps modem and taking 30 to 40 minutes to download all of my messages. If I didn’t, my server email box would be full. However, Gmail changed all of that with offers of an unbelievable 5Gb or space. This was back in the days when people lusted over Zip drives and their 100Mb capacity. 5Gb of space was 50 times that amount.
When you get a domain with GoDaddy, you get 100 email forwards. This allows someone to email you at your domain, but you get the email in your Gmail box. This takes care of the sending issue. People will send you email to your domain address.
The problem is receiving emails. You need to setup Gmail to allow you to Send as a different email address. Fortunately, Gmail allows you to do this.
Now, you can use the Gmail website to do all of your mailings. If you want to use the local mail client, you’ll need to do a few things. You want to make sure Gmail is set to use IMAP and not POP.
Fortunately, Gmail offers [url=https://support.google.com/mail/answer/78892?hl=en]directions on how to setup Gmail to use your local mail client on various platforms.
I do this all of the time. I use Zoho as my email provider (Similar to Google’s Gmail. I try my best to stay away from Google because they already know way too much about me), setup my Godaddy email forwardings, and use both my iPhone and Mac’s Mail client (and for some reason, I’m not scared that Apple knows way too much about me).
There are only a few occasions where things go wacky and my mail bounces because the recipient’s email provider thinks I’m Spam. There’s suppose to be a fix on Zoho, but I haven’t spent the time needed to figure it out.