Mail not working

[xevell]

Since March 8 Ive been having problems sending mail. I go to the trace and these are the errors I get.

SMTP error from remote mail server after RCPT TO:: host 198.91.80.251 [198.91.80.251]: 421 4.3.2 Service shutting down, closing channel
SMTP error from remote mail server after RCPT TO:: host 198.91.80.251 [198.91.80.251]: 451 4.3.0 Error: queue file write error

I have also gotten this to my inbox

This message was created automatically by mail delivery software.
A message that you sent has not yet been delivered to one or more of its
recipients after more than 72 hours on the queue on absolut.x10hosting.com.

The message identifier is: 1UE5RN-0000d0-GY
The date of the message is: Fri, 8 Mar 2013 17:06:36 -0500
The subject of the message is: Re: The About Page

The address to which the message has not yet been delivered is:

annalisabahadur@hotmail.com
Delay reason: SMTP error from remote mail server after RCPT TO:<annalisabahadur@hotmail.com>:
host 198.91.80.251 [198.91.80.251]: 451 4.3.0 Error:
queue file write error

No action is required on your part. Delivery attempts will continue for
some time, and this warning may be repeated at intervals if the message
remains undelivered. Eventually the mail delivery software will give up,
and when that happens, the message will be returned to you.

Anyway to fix? I need to send mail!

Thanks in advance.

 

[hbazer]

About 16:30 2013-03-14 UTC

I ran a Email test PHP script on the three (3) free-hosting servers and a Premium server [ s1 ]

The free-hosting servers would send mail to their self - where it was read - but not to any other Email server

The Premium server would send mail to its self - and to Email accounts on the three (3) free-hosting servers - and to a gmail.com Email account - where they were read

SMTP server for the three (3) free-hosting servers has a 'issue' with sending Emails to 'other' servers

 

[aof2000]

i have the same problem.

help please.

thanks in advance