First, we setup the mail-forwarding, as it is easier:

• Open your Mac Inbox
• Goto Rules
• Check Redirect All Mail to: and enter the email address you wish to use in the box below.
• Check Keep a copy and Preserve To/Cc Fields, if you want to
• Click update.

Now all e-mail arriving at your Mac email address with be forwarded to your desired inbox, except the Facebook Network verification email...for some reason, it doesn't arrive
For Gmail:

• Open your Gmail Inbox
• Go to Settings > Accounts and Import
• Click the Send email as button
• Type your McMaster email
• Gmail will detect the SMTP server settings automatically, enter your Mac password in the form.
• Check your Mac email Inbox for the verification link/code, or check this same inbox for the forwarded mail (which should arrive due to the forward rule)
• Enter the code or follow the link
• To send email with your Mac email ID, click the dropdown menu in the From: field when composing an email/reply

For Windows Live Mail:

• Open up your WLM Inbox
• Click Options > More Options in the top right corner
• Manage your account > Send and receive email from other e-mail accounts
• Add an e-mail account
• Type your Mac email address and password
• Click advanced options, input > Incoming mail Server: muss.cis.mcmaster.ca
• Check your Mac email Inbox for the verification link/code, or check this same inbox for the forwarded mail (which should arrive due to the forward rule)
• To send email with your Mac email ID, click the dropdown menu in the From: field when composing an email/reply

For Yahoo:

• Open your Yahoo! inbox
• Goto Options > Mail Options in the top right corner
• For the New Yahoo! version, click Accounts in the left pane. For the dod one, click Mail Addresses in the right pane (you have to be in the Mail section)
• Click Add > Enter Account name > Enter Name and your Mac Email ID
• Enter the following details:
  Mail Server: muss.cis.mcmaster.ca
  username: <Your Mac ID>
  password: <Your Mac Password>
  Click Setup Mail server
• Send Verification
• Check your Mac email Inbox for the verification link/code, or check this same inbox for the forwarded mail (which should arrive due to the forward rule)
• Enter the Code or follow the link
• To send email with your Mac email ID, click the dropdown menu in the From: field when composing an email/reply

Now you can ditch that MUSS Server, but be sure to check it atleast once a month for any mail that is not forwarded.
You can also make a different rule for the forwarding so that the mail is marked as read when it is forwarded.

For this, add a rule, edit it, from the drop-down menu, select Mirror To:
Enter your email address in the text box in the front. Click Update
Back in the Rules page, empty the text box below Redirect All mails to: otherwise you will receive 2 forwarded mails for every email.
Select Mark in the newly appeared drop-down and type read as parameter.

Nice! You should submit it as an article:

http://www.macinsiders.com/forumdisplay.php?f=67

hey, just one quick note though: One Windows Live Mail, you will get an error. Follow the instructions that you provide, but when you put your info in to Live, and hit submit or whatever it is, it will tell oyu that somethign about the Server is incorrect, adn it will bring more options out for you to fill in. One of them will say pop3.muss.cis.mcmaste r.ca or something very similar to that... you need to remove the pop3. part of that line and then follow through with the rest of the steps. I just did this myself. It worked great! Thanks for the article though, since I was just about to post this as a question.

Thanks Afzal.

Thanks, this will be very useful. Less of a hassle, just get everything in one inbox.

Sounds great! I would definitely listen to jhan and submit it as an article, it would be really useful and convenient to a lot of people!

I keep getting this problem when I try to:Check your Mac email Inbox for the verification link/code, or check this same inbox for the forwarded mail (which should arrive due to the forward rule)

There's a problem connecting to the POP mail server. Make sure that the server name and port you entered are correct. The best way to do this is to check with your other e-mail provider. You're looking for the "incoming mail server", which is probably listed under something like "POP access settings".

Can anyone help me out?

check my last post.. I'm assuming you are using Live

Thanks a lot Mike, works now

lol, no problem.

hmm, I didn't check my Mac email through Live Mail..i just merged Yahoo! to find out the exact number of steps.
I'll make the change here then update the post...and also submit the article

edit: updated Windows Live Mail instructions

great post... thanks =)

I keep on getting "Couldn't reach server. Please double-check the server and port number." error coming up on gmail when Gmail detects the SMTP server settings automatically, and were you enter your Mac password in the form.
Does anyone know how to fix it?

I don't know why you're getting this message, I didn't.

After you enter your username and password, Gmail asks your whether you want to use the Gmail server or muss.cis.mcmaster.ca

click, Send through muss.cis.mcmaster.ca SMTP servers and you will see the options below

Server: muss.cis.mcmaster.ca (Port: 465 or 587) both work fine
Username: Your Mac ID
Password: Your Mac Password

its fixed! the problem was i had "smtp." in front of "muss.cis.mcmaster.ca " in the server box.
Thanks alot!