Exceeding Mailbox Quota

You may have noticed that I placed a little note on the main page about difficulties with my email account for this domain so I thought I would explain the mistake that I made. I’m still kicking myself for making such a stupid mistake but there is a learning opportunity hidden in every mistake.
Hmm…Nobody Likes Me Today
Late Wednesday night I had received a few email messages before shutting down for the night and then there was nothing new when I got to work on Thursday morning. As the morning turned to afternoon, my email account was still sitting idle and I was beginning to think that I had done something wrong and nobody loved me any more. 🙁
By the time that I left work, I was wondering if there was a problem with the mail server on my account as there were still no new messages although I had noticed a few new comments on the site. While not for everyone, I have the email notification set for all new comments to the site so I can be sure to send a reply or visit the post and return the comment. As I was leaving work, I sent myself a test message from another account and it bounced right back to me. Doh!
Exceeded Mailbox Quota
When I created this site and added my email account, I was not used to the webmail clients that are offered so I added a forwarder to my email account so that all messages are delivered to an email address for my other domain. The reason I did this was because the webmail client offered through my other host is very easy to use and I am very familiar with the interface.
But I overlooked one minor detail that turned into a rather large problem. Since I had created the mailbox on this domain and then set it up to forward the messages, I was not cleaning up the mailbox here and all of the messages were accruing in my account. With the mailbox quota set to a rather modest level, it didn’t take long to exceed the mailbox quota and everyone began to get an undeliverable message when they tried to send me email.
Once I realized the problem, I logged into the mail client through my host and purged all of the messages to clear everything out. In addition, I bumped the mailbox quota up to hopefully avoid this problem in the future. However, since I have the forwarder set up now I can really delete the actual mailbox and continue to have everything sent to my other address.
Alternative Mail Clients
In dealing with this issue, I started to look for an alternative setup to how I handle email. I’ve always preferred the webmail clients as that gives me the flexibility to log into my account from anywhere and have all of my email right there.
On this site, I have access to three different webmail clients: Horde, Round Cube and SquirrelMail. After tinkering around with each of them, I preferred Horde out of those three but it wasn’t familiar enough to replace my current webmail client.
It seems that a lot of people prefer to use something like Thunderbird or Outlook to handle all of their email. As I continue to look for the best solution to suit my email habits, I thought that I would ask all of you…
What do you use for your email client?