email sending problems

Do you maintain your own website and IP address?

Or is it your ISP's servers? If so, then you need to address this with your internet provider.

I've had a couple of instances where some emails to relatives in a foreign country were rejected because my IP address was on a black list (and that is not MY IP address - it's assigned by the provider). Upon checking with my provider, I was told that resetting the modem would change the IP address, so I now do that occasionally. It also gets rid of any glitches. Simply unplug the modem power for about 30 seconds, plug it back in and wait until all of the lights are back on. Go back to your computer and make sure you can access the internet and you're all done.

To see if it's your provider, What's my ip...

http://www.whatismyipaddress.com/

Start with these three, check SpamCop or SpamHaus to see if your IP is there...

http://spamcop.net/bl.shtml

http://www.spamhaus.org/lookup.lasso

http://www.spamhaus.org/zen/

Sometimes an ISP will bloc a whole other ISP too, if it's the source of too much SPAM.

Might also see this post by Gallomimia...

http://discussions.apple.com/message.jspa?messageID=9465359#9465359

If none of those are it, then report back please.

You need to speak to your internet provider as they are routing you through their servers. So, reset your modem (as I mentioned) and your IP address should change once you are connected again.

Sorry, Apple wiped that link. :(

Resolution...

https://www.spamcop.net/fom-serve/cache/405.html