Images in email signatures – linked or embedded?
The HTML format makes it possible to add images to emails and email signatures. Graphics can be included as:
- linked (online) images, which aren’t a part of an email but are fetched from external locations (servers) when a recipient reads the email. Linked images are referenced in the email's HTML source code by using a URL to an external location, e.g.
- embedded images, which are a part of an email body. Only local graphics can be used as embedded images - they are added to emails as hidden attachments and are referenced in the email's source code via a Content-ID:
Regardless of which method you choose, we recommend using the most popular image formats, such as JPG or PNG for static graphics and GIF for animated elements, as they are supported by most mail clients. Learn more
From the table below, you can learn about the advantages and disadvantages of each method.
Downloaded directly from server
Included in every message
* Our software can automatically fix this issue for iPhones and iPads. Learn more
General tips on using embedded and linked (online) images in email signatures
In general, embedded images should perform better for most common email signature scenarios. They are an integral part of an email, which makes them more reliable – your recipients don’t need to perform any additional actions to see your email signatures exactly the way you designed them (Fig. 1.). That’s why, it’s a good idea to add you company logo, social media icons, or marketing banners as the embedded images. These elements are usually not that big in size (e.g. less than 0.5 MB), so your emails should not increase that much in size.
On the other hand, linked/online images are a better solution if you are concerned about the size of your emails. For example, you want to add a high-resolution image to show off your product directly in your email signature, and the image is big in size (e.g. above 1 MB). In such a case, adding an online image that links e.g. to your server/website is a better idea to avoid clogging your and your recipients’ mailboxes with large amounts of data, which is not that difficult even if you don’t exchange a great number of emails.
|Related products:||CodeTwo Email Signatures for Office 365 1.x, CodeTwo Exchange Rules 2007 3.x, CodeTwo Exchange Rules 2010 2.x, CodeTwo Exchange Rules 2013 1.x, CodeTwo Exchange Rules 2016 1.x, CodeTwo Exchange Rules 2019 1.x, CodeTwo Exchange Rules Pro 2.x|
|Last modified:||July 31, 2023|
|Created:||November 30, 2017|