Confirmation Emails being sent to spam: Mailer

Hello
All of our confirmation email are being sent to the spam folder.
We were noted by our server to change our phpmailer from sourceforge to our server mailer because sourceforge is blocked by email providers such as gmail.
Please let us know how to change the phpmailer. Thanks.

Error message:
X-Mailer: PHPMailer 5.1 (phpmailer.sourceforge.net)
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="b1_f7edbc0a7181f673c31e5af11d722214"
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname - upl.uploadyourdog.com
X-AntiAbuse: Original Domain - gmail.com
X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse: Sender Address Domain - uploadyourdog.com
X-Get-Message-Sender-Via: upl.uploadyourdog.com: authenticated_id: no-reply@uploadyourdog.com
Quote · 28 Mar 2013

Try to make sure that email you are sending from matches the SMTP account you are using to send mail from.

For example if you are sending mail from uploadyourdog@gmail.com, but override email to send mail from and set it to no-reply@uploadyourdog.com

Rules → http://www.boonex.com/terms
Quote · 29 Mar 2013
 
 
Below is the legacy version of the Boonex site, maintained for Dolphin.Pro 7.x support.
The new Dolphin solution is powered by UNA Community Management System.