Deliverability is a core tenant to the Sigstr value proposition. While the Sigstr application does not in itself warrant a reason for concern, our team takes a proactive approach to ensure no issues arise. Whenever an image or link is included in an email message, whether generated from Sigstr or elsewhere, it slightly increases the chance of the message being filtered. To counteract this risk, we have strategic relationships with deliverability partners and offer a variety of product features that can be utilized to minimize vulnerability.

Custom Domain

The Sigstr Custom Domain solution provides an opportunity for your organization to create a subdomain and delegate that subdomain to your Sigstr account. When this occurs, your company branded subdomain effectively replaces the Sigstr domain that is provided with your account license. This ensures that the domain of the link(s) inside an email signature match the sender’s email domain.

Once created, the Custom Domain is listed in a section of the Integrations Tab.

Zero Attachments

The campaign and signature images generated by Sigstr are never attached to user emails. Sigstr simply appends HTML anchor and image tags to the user signature. Both the anchor href and image src attributes resolve to the Sigstr web service. The signatures images are displayed by retrieving the image files on Amazon S3 that are associated with your currently active signature. When a campaign image-link is clicked, the email recipient is sent to the Sigstr web service, then redirected to the “Clickthrough URL” defined by the campaign.

Strategic Partnerships

Sigstr partners with a variety of deliverability and security experts, including InboxPros, that will assist if necessary. We are also proud to call ReturnPath and 250ok customers, two of the leading deliverability organizations in the market. If you ever learn that Sigstr is affecting deliverability or security, please let us now immediately and we will work diligently to resolve any issues.

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