"connection denied due to dictionary attack" when I try to send out mail

Hi--
I got this message "connection denied due to dictionary attack" when I tried to send out mail today. It was the first time I ever saw anything like this. I thought it was a problem with the mail server from my website, but no one else had the problem. After about 12 hours, it suddenly stopped...
Was I being hacked? Was someone trying to send out email/spam through A)my home machine or B) my website? And if so, how can I protect myself from it?

Well you second post was the correct question because I was going to say you got a second hand macbook pro, didn't change anything, and expected mail to work with your ISP. The mail settings were thus those of the previous owner. So you are correct to ask what your ISP's settings should be.
Unfortunately I can't answer that. You have to get that from your ISP. They proably have a web page for it.
You need to know:
Incoming mail server (pop)
Incoming mail server login name
Incoming mail server password
POP port
Does is require SSL?
Authentication for using POP server (probably password)
Outgoing mail server (SMTP)
Outgoing mail server login name (probably same as incoming)
Outgoing mail server password (probably same sas incoming)
SMTP port
Does is require SSL?

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The specific text of the error message is very important here — I'm not sure exactly you're encountering here.
If you're able to connect to your email server and are able send email to other email addresses and if the failures are specific to one email recipient address, then please contact the intended recipient of the failing email, and confirm their address is valid. (This is the way I'm reading your question.)
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Hi
I think this seems to be a problem at the receiving end
Things that might be wrong on your end as well which you need to check below
Do a (rDNS, telnet to your server to check the FQDN and IP Blacklists check)
Try creating a dedicated send connector for this domain alone for this address space alone and see the results . Select the option offer basic authentication only after starting TLS and see the results
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In your case i think mostly it should be the fire wall not allowing X-AnonymousTLS type connections
Remember to mark as helpful if you find my contribution useful or as an answer if it does answer your question.That will encourage me - and others - to take time out to help you Check out my latest blog posts on http://exchangequery.com Thanks Sathish
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"connection denied due to dictionary attack" when I try to send out mail

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