Custom Email-based Tracking Script/Pixel

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Custom Email-based Tracking Script/Pixel
Hello.
We need someone to create a tracking pixel that is intended for use in email marketing. This pixel will be used in email service providers, such as Mailchimp, Sendgrid, Mailgun, and Campaigner.
Important: Email clients render have CSS and HTML limitations (such as no Javascript), so you must be aware of the limitations of coding for email.
I would like the pixel to track:
Device
Geolocation
Read time (or how long the pixel is loaded, before being closed)
Email Client
Opens
Email Address of Opens
Recipient Domain
I have a custom admin dashboard, which should display the analytics/data from the pixel.
Please note: The pixel will be used in many different campaigns, so I need the ability to generate unique tracking codes to be inserted in different campaigns.
I look forward to discussing this further.
Skills:
PHP
, Mailchimp
, HTML
, CSS
, Email Developer

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