Cannot send email...

I dont know why but my email is all messed up....I could receive email from any account but i cannot send email it never gets to an email....Also my email set up so that my address is [email protected] how can I change that it becomes [email protected]????
Thanx...

 

till sorry for stupid question but where do i find that?

 

In the /var/log directory.
You will see a file named mail.log

 

May 22 23:59:02 linux postfix/postfix-script: starting the Postfix mail system
May 22 23:59:02 linux postfix/master[13329]: daemon started -- version 2.2.9, configuration /etc/postfix
May 22 23:59:02 linux postfix/qmgr[13338]: 0F253FA31: from=<com>, size=839, nrcpt=1 (queue active)
May 22 23:59:03 linux postfix/qmgr[13338]: B6549E6BE: from=<[email protected]>, size=543, nrcpt=1 (queue active)
May 22 23:59:33 linux postfix/smtp[13357]: connect to mx1.optonline.net[167.206.4.77]: Connection timed out (port 25)
May 22 23:59:33 linux postfix/smtp[13359]: connect to mx1.optonline.net[167.206.4.77]: Connection timed out (port 25)
May 23 00:00:03 linux postfix/smtp[13357]: connect to mx2.optonline.net[167.206.4.79]: Connection timed out (port 25)
May 23 00:00:03 linux postfix/smtp[13359]: connect to mx2.optonline.net[167.206.4.79]: Connection timed out (port 25)
May 23 00:00:03 linux postfix/smtp[13357]: 0F253FA31: to=<andrusha@net>, relay=none, delay=401022, status=deferred (connect $
May 23 00:00:03 linux postfix/smtp[13359]: B6549E6BE: to=<[email protected]>, relay=none, delay=102474, status=deferred (connect $
May 23 00:17:47 linux freshclam[4145]: Received signal: wake up
May 23 00:17:47 linux freshclam[4145]: ClamAV update process started at Wed May 23 00:17:47 2007
May 23 00:17:47 linux freshclam[4145]: SECURITY WARNING: NO SUPPORT FOR DIGITAL SIGNATURES
May 23 00:17:47 linux freshclam[4145]: See the FAQ at http://www.clamav.net/support/faq for an explanation.
May 23 00:17:47 linux freshclam[4145]: main.cvd is up to date (version: 43, sigs: 104500, f-level: 14, builder: sven)
May 23 00:17:47 linux freshclam[4145]: daily.inc is up to date (version: 3283, sigs: 13207, f-level: 15, builder: ccordes)
May 23 00:17:47 linux freshclam[4145]: --------------------------------------
May 23 01:22:22 linux postfix/qmgr[13338]: 0F253FA31: from=<[email protected]>, size=839, nrcpt=1 (queue active)
May 23 01:22:22 linux postfix/qmgr[13338]: B6549E6BE: from=<[email protected]>, size=543, nrcpt=1 (queue active)
May 23 01:22:52 linux postfix/smtp[14898]: connect to mx1.optonline.net[167.206.4.77]: Connection timed out (port 25)

 

Looks to me that your ISP is blocking port 25 for outgoing mail.

If it's "Comcast Cable Communications", than your port 25 is for sure blocked.

 

my server is on optimum online with boost which has port 25 open.....