Tried everything :(

Hi Jason!

Thanks for your clear instructions. I set everything up correctly but it won’t let me do a test email. At the top of my dashboard it says:
Postman: wp_mail has been declared by another plugin or theme, so you won’t be able to use Postman until the conflict is resolved.

I’ve deactivated just about all my plugins but the message still remains. I’m using a theme called Parallax One, do you think its that?

This is what the diagnostic test said:
OS: Linux a2plcpnl0513.prod.iad2.secureserver.net 2.6.32-673.26.1.lve1.4.18.el6.x86_64 #1 SMP Fri Oct 21 11:58:14 EDT 2016 x86_64
PHP: Linux 5.5.38 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=No, allow_url_fopen=Yes, mcrypt=Yes, zlib_encode=Yes
WordPress: 4.7 en_US UTF-8
WordPress Theme: Parallax One
WordPress Plugins: Bee Pricing Table, CSS Hero Animator, CSSHero, Google Analytics, Postman SMTP, Simple Page Ordering, Page Builder by SiteOrigin, SiteOrigin Widgets Bundle
WordPress wp_mail Owner: /home/mycolorshop/public_html/wp-includes/pluggable.php
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email
Postman: 1.7.2
Postman Sender Domain (Envelope|Message): mycolorshop.com | mycolorshop.com
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: Gmail API (https:oauth2://www.googleapis.com:443)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 0 | 0
Postman Stealth Mode: Yes

Thank you so much for your help!