To ensure smooth and uninterrupted email delivery from Nectar, we recommend that your Network and Security teams whitelist the following IP addresses, email addresses, domains, and URLs.
Tip: Whitelisting these items helps prevent important messages—such as rewards, notifications, and support emails—from being blocked or filtered as spam.
Which IP addresses should I whitelist?
SMTP IP Addresses:
Amazon Web Services:
34.192.253.140
Sendgrid (TangoCard)
50.31.57.233
50.31.57.231
50.31.57.230
50.31.57.23
50.31.32.95
198.37.150.177
167.89.43.239
IP Ranges - Postmark:
50.31.156.96/27 (50.31.156.96 – 50.31.156.127)
104.245.209.192/26 (104.245.209.192 – 104.245.209.255)
Internal Comms IP:
159.183.82.50
Which email addresses should I whitelist?
Which domains should I whitelist?
email.tangocard.com
rewardmail.tangocard.com
What URLs should be considered safe?
If your system parses URLs in email content, mark the following as safe:
tangocard.com
*.cloudinary.com
cloudinary.com
giphy.com
rewardlink.io
rewardlink.tangocard.com
rl.tangocard.com
click.rewardlink.com
nectarhr.com
Note: Including wildcard domains like *.cloudinary.com helps ensure full coverage for dynamic or subdomain-based content.