Hi friends,
My CentOS cannot send mails (message) to my verizon cell-phones. I tested to send it to yahoo or gmail, it worked fine.
I can send mail to my cell-phone from gmail.
I view the log in /var/log/maillog, it shows:
Feb 3 09:04:08 Acp1 sendmail[15792]: q125PsaF031608: to=<root@Acp1.localdomain>, delay=1+11:38:14, xdelay=00:00:00, mailer=esmtp, pri=3274220, relay=postbox.fabulous.com., dsn=4.0.0, stat=Deferred: Connection refused by postbox.fabulous.com.
Feb 3 09:04:08 Acp1 sendmail[15792]: q120UuaE006119: to=<root@Acp1.localdomain>, delay=1+16:33:12, xdelay=00:00:00, mailer=esmtp, pri=3722978, relay=postbox.fabulous.com., dsn=4.0.0, stat=Deferred: Connection refused by postbox.fabulous.com.
Please help!
Thank you!

Is the machine you're sending from using a DHCP address? I've seen some email services only allow connections from static i.e. not dynamic IP's. If it's a static IP could it be blacklisted or lacking a reverse DNS entry?

Thanks linuxguy7820,
The server is local which is set with static IP. The external IP is also static.
Thanks

Can you connect to the Verizon mail server from the CentOS machine and run some basic SMTP commands and see if you can get can get a better error message? It looks like it's using ESMTP to send mail, is it possible to try using only SMTP.

I'm a Linux newbie. Honestly, I use the email server with everything in default setup. I don't know how to change it from ESMTP to SMTP. Could you help me to do that?
Thanks

To be honest my sendmail skills are pretty basic. I believe there's a special process where you need to edit /etc/mail/sendmail.mc then compile the configuation file into something sendmail will read at startup.

I don't know how to edit the file /etc/mail/sendmail.mc. I's afraid that I will make it worst. Could you or anyone else help please!

I got different error msg in maillog:
---------------
Feb 6 14:51:21 localhost sendmail[29547]: q16MpLsZ029547: from=root, size=51, class=0, nrcpts=1, msgid=<201202062251.q16MpLsZ029547@Acp3>, relay=root@localhost
Feb 6 14:51:21 localhost sendmail[29548]: q16MpLmP029548: from=<root@Acp3>, size=298, class=0, nrcpts=1, msgid=<201202062251.q16MpLsZ029547@Acp3>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Feb 6 14:51:21 localhost sendmail[29547]: q16MpLsZ029547: to=7144939333@vtext.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30051, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (q16MpLmP029548 Message accepted for delivery)
Feb 6 14:51:22 localhost sendmail[29551]: q16MpLmP029548: to=<7144939333@vtext.com>, delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=120298, relay=smtp-sl.vtext.com. [69.78.67.53], dsn=5.0.0, stat=Service unavailable
Feb 6 14:51:22 localhost sendmail[29551]: q16MpLmP029548: q16MpMmP029551: DSN: Service unavailable
Feb 6 14:51:22 localhost sendmail[29551]: q16MpMmP029551: to=<root@Acp3>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=31519, relay=acp3, dsn=5.1.2, stat=Host unknown (Name server: acp3: host not found)
Feb 6 14:51:22 localhost sendmail[29551]: q16MpMmP029551: q16MpMmQ029551: return to sender: Host unknown (Name server: acp3: host not found)
Feb 6 14:51:22 localhost sendmail[29551]: q16MpMmQ029551: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32543, dsn=2.0.0, stat=Sent
-----------------------------
Could anyone help me,please!
thanks

Anyone help, please!

@DanStrong, you may not like this answer, but have you considered simply sending emails to your phone as SMS messages? That's what I do. (My service provider is Sprint.)

Wikipedia keeps a nice list of SMS gateways that you should be able to email to:
http://en.wikipedia.org/wiki/List_of_SMS_gateways

-------

edit01: Sorry, I see you are already doing that. ("7144939333@vtext.com" <-- from your failed message.)

-------

edit02: BTW, here's an example of using telnet(1) to do SMTP testing -

http://www.freebsdwiki.net/index.php...ing_via_Telnet

Don't fear editing the sendmail configuration files.

Make a copy before editing, then edit away using a text editor.

If they get messed up, just copy the originals back into place.

I've never set up sendmail (I want to take a whirl at it), but here's a link to the documentation: http://www.sendmail.org/documentation

Thanks to Anomie, FrankBell,
I finally use PEAR and it works after 3 days of trying to edit sendmail.mc and other files.
Happy Valentines week!