Using WLM 2012 on my computer to download and send messages from Gmail account, ISP is Verizon DSL

Cannot send e-mail to text on phones @tmomail.net , always used to be able to do so using WLM2011 on computer with ISP of RoadRunner and road runner mail. 

any ideas on setting I may need to set?

This is the message I get:

The recipient server did not accept our requests to connect. Learn more at http://support.google.com/mail/bin/answer.py?answer=7720

[(0) mm3.tmomail.net. [66.94.9.228]:25: 421 mail.tmail.com closing
connection]

----- Original message -----

DKIM-Signature: v=1;
a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
       
h=message-id:from:to:subject:date:mime-version:content-type
        
:content-transfer-encoding:importance;
       
bh=jNtpv0EepFX3QyUtF5vz0GwcmdA0UeyTDSZ+vYFAblI=;
       
b=JiWgOjwWsym/9DPD/qG+EpZSCDUcAfUI5uiEAM8D2lRgFoIMqZvF3bMJZYMBRs8Pv9
        
QTmqH0Pw/MWU6dMNotDyveCGb5vr+BOLfRclkMe/LRfhPFyq2A4aEa95C/YWCqUd4Pb9
        
ZAJSQtEMjjSFhf7aFFZ9AwXbJZTdsl7Kb9PsPDy1LyNiLVaU/IJ40v2++ZrY0hhv7RX0
        
oR86WPd+0BWXd++bctqv/V1hY1sqRYPTaWAEawgSWDTVOa61luyUuNVhQ2ikrlonHCBQ
        
ZKmAJS/x9Sgl4GMVk1z0+I7nq9Pxnm1oOaJZOtAB78TS3aiyBUAEcNSGm6SHaOPNX7w6
        
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Message-ID:
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From:
"Don Williams" <*** Email address is removed for privacy ***>
To:
"Don Phone" <*** Email address is removed for privacy ***>,
"Sherry
Mobile" <*** Email address is removed for privacy ***>
Subject:
Silk -- Interactive generative art
Date: Fri, 4 Jul 2014 13:22:26
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