I think that first link I posted may actually be broken itself.

I have just done a manual SMTP session to your address.

Looking up the MX record:
Code:

---

[root@dipsy /root]# dig mx conneriver.com

; <<>> DiG 9.2.1 <<>> mx conneriver.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7484
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

;; QUESTION SECTION:
;conneriver.com.                        IN      MX

;; ANSWER SECTION:
conneriver.com.         14400   IN      MX      0 conneriver.com.

;; AUTHORITY SECTION:
conneriver.com.         86400   IN      NS      ns1.rdns15.net.
conneriver.com.         86400   IN      NS      ns2.rdns15.net.

;; ADDITIONAL SECTION:
conneriver.com.         14400   IN      A       205.234.216.91
ns1.rdns15.net.         172800  IN      A       205.234.216.91
ns2.rdns15.net.         172800  IN      A       205.234.216.92

---

and sending a message:
Code:

---

[root@dipsy /root]# telnet 205.234.216.91 25
Trying 205.234.216.91...
Connected to 205.234.216.91.
Escape character is '^]'.
220-blazecast15.rdns15.net ESMTP Exim 4.63 #1 Thu, 01 Feb 2007 12:35:51 -0600
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
HELO dipsy.norman.cx
250 blazecast15.rdns15.net Hello dipsy.norman.cx [81.187.229.66]
MAIL FROM:<[email protected]>
250 OK
RCPT TO:<[email protected]>
250 Accepted
DATA
354 Enter message, ending with "." on a line by itself
Test message, manual SMTP
.
250 OK id=1HCgoP-0005dW-1q
QUIT
221 blazecast15.rdns15.net closing connection
Connection closed by foreign host.

---

So your mail server is definitely accepting messages for you, even if they aren't getting to you.