postfix connection is timing out? trying to send email to my yahoo?

I have installed Postfix using Yum, I am running Fedora 20.

yum install postfix.

I setup the postfix main.cf file. I believe I have done everything correctly, Please, can someone guide me to right direction. Am I missing something. I think My ISP Verizon FIOS, is probably blocking port 25? I have configured IPTables in my Linux server. Should I disable the IPtables and test it out. Can I configure Postfix to use another port, and forward the port on my ROUTER.

Any help is greatly appreciated.

Code:

postfix/smtp[12416]: connect to mta5.am0.yahoodns.net[98.138.112.38]:25: Connection timed out

postfix/smtp[12415]: connect to mta5.am0.yahoodns.net[98.138.112.37]:25: Connection timed out

postfix/smtp[12417]: connect to mta7.am0.yahoodns.net[66.196.118.37]:25: Connection timed out

postfix/smtp[12417]: EEC3F80EEB: to=<user@yahoo.com>, relay=none, delay=41360, delays=41210/0.02/150/0, dsn=4.4.1, status=deferred (connect to mta7.am0.yahoodns.net[66.196.118.37]:25: Connection timed out)

postfix/smtp[12418]: connect to mta7.am0.yahoodns.net[98.138.112.37]:25: Connection timed out

postfix/smtp[12418]: EB8E380EF3: to=<user@yahoo.com>, relay=none, delay=40602, delays=40452/0.03/150/0, dsn=4.4.1, status=deferred (connect to mta7.am0.yahoodns.net[98.138.112.37]:25: Connection timed out)

postfix/smtp[12416]: connect to mta6.am0.yahoodns.net[66.196.118.37]:25: Connection timed out

postfix/smtp[12415]: connect to mta6.am0.yahoodns.net[98.138.112.34]:25: Connection timed out

postfix/smtp[12416]: EFDB080EE9: to=<user@yahoo.com>, relay=none, delay=40597, delays=40447/0.02/150/0, dsn=4.4.1, status=deferred (connect to mta6.am0.yahoodns.net[66.196.118.37]:25: Connection timed out)

postfix/smtp[12415]: EC18F80EF6: to=<user@yahoo.com>, relay=none, delay=685, delays=534/0.02/150/0, dsn=4.4.1, status=deferred (connect to mta6.am0.yahoodns.net[98.138.112.34]:25: Connection timed out)

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