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Email delivery is becoming increasingly complicated, so its important to take steps to ensure your email client is properly configured so that valid emails are deliverable.

The following are steps that you can take to improve the deliverability of the UltraCart email notifications to your email address/client.

Add UltraCart addresses to your email client contacts list

Please make sure that you have added our email addresses to your email clients contact list:

Whitelist the Ultracart Public IP addresses:

Whitelisting

If your gateway or fulfillment provider or email server requires you provide a list of allowed IP addresses, you should provide them with the following addresses.

52.200.85.63
35.169.188.36
34.225.48.115
35.170.241.190
35.169.97.31

All traffic from the production UltraCart environment will originate from one of these IP addresses.

For more details on whitelisting IP addresses in Gmail, see:
https://www.maketecheasier.com/blacklist-whitelist-ip-addresses-gmail/

Set up DKIM to prevent email spoofing

Please review the following knowledgebase article form Google regarding the generation and configuration of your own DKIM key:

https://support.google.com/a/answer/174124?hl=en

Steps to set up DKIM

Generate the domain key for your domain at the URL above.
Add the public key to your domain's DNS records. Email servers can use this key to verify your messages' DKIM signatures.
Turn on DKIM signing to start adding a DKIM signature to all outgoing messages.

Setup SPF record verification

Sender Policy Framework (SPF) is an email authentication method that specifies the mail servers authorized to send email for your domain. SPF helps protect your domain from spoofing, and helps ensure that your messages are delivered correctly. Mail servers that get mail from your domain use SPF to verify that messages that appear to come from your domain actually are from your domain.

For more details see: https://support.google.com/a/answer/33786

SPF help prevents spoofing—Spammers can forge your domain or organization to send fake messages that appear to come from your organization. This is called spoofing. Spoofed messages can be used for malicious purposes, for example to communicate false information, to send out harmful software, or to trick people into giving out sensitive information. SPF helps receiving servers verify that mail sent from your domain is actually from your organization, and is sent by a mail server authorized by you.
SPF helps deliver messages to recipients’ inboxes—SPF helps prevent messages from your domain from being delivered to spam. If your domain doesn’t use SPF, receiving mail servers can’t verify that messages appearing to be from your domain actually are from you. Receiving servers might send valid messages to recipients' spam folders, or might reject valid messages.

Step 1: Create your TXT record for SPF

A TXT record for SPF defines the mail servers that are allowed to send mail for your domain.

A single domain can have only one TXT record for SPF. However, the TXT record for a domain can specify multiple servers and domains that are allowed to send mail for the domain.

TXT record contents

If all email from your organization is sent from G Suite, use this line of text for your TXT record:

v=spf1 include:_spf.google.com ~all

If you send mail in one or more of these ways in addition to G Suite, you must create a custom TXT record for SPF:

You send mail from other servers.
You use a third-party mail provider.
Your website uses a service that generates automatic emails, for example you have a "Contact us" form.

Create your TXT record using the information in Server information for your TXT record and TXT record format.

About settings that are managed by your domain host: https://support.google.com/a/answer/35232

Steps to Improve Email Delivery