Error while fetching mail for virtual mail domain account!

[honey bee]

Hello,
I have created a virtual email domain, lnxsitenew.com, when i telnet it:

telnet mail.lnxsitenew.com 53

, it connects.

Its DNS entries are:

mail.lnxsitenew.com. IN A 192.168.0.102
lnxsitenew.com. IN MX 10 mail.lnxsitenew.com.
lnxsitenew.com. IN MX 15 lnxsitenew.com.

, where 192.168.0.102 is my system's ip.

When i send mail to its user, the mails come in its mailbox i.e.

/var/spool/vmail/lnxsitenew.com/user

Now, i have created an account for its user in Evolution, where i have the following settings:

Receiving Email
Host: mail.lnxsitenew.com
Username: user@lnxsitenew.com

Sending Mail
I have selected "Sendmail".

In /etc/mail/local-host-names, i have added site name and restarted the sendmail service.

Now when i send receive mail i get the following message:

Error while Fetching Mail.
Could not connect to mail.lnxsitenew.com: Connection refused.

What can be the problem?

[honey bee]

Ok, i am able to retrieve my mails using Evolution and Webmail.I configured dovecot and it worked for me.

Now, when i send mails through this account they are returned back with the following message:

----- The following addresses had permanent fatal errors -----
<hina@advcomm.net>
(reason: 501 5.7.1 <hina@lnxsitenew.com>... Sender domain must exist)

----- Transcript of session follows -----
... while talking to advcomm.net.:
>>> MAIL From:<hina@lnxsitenew.com> SIZE=945
<<< 501 5.7.1 <hina@lnxsitenew.com>... Sender domain must exist
501 5.6.0 Data format error

What can be the problem?

[shrikantpillay]

try creating user hina first