How to teach Clutter You Do Want an Email **Note.to quickly add our sender, domain name, or mailing list name to the Safe Senders or Safe Recipients Lists, right-click on our message, and then on the shortcut menu, point to Junk E-mail, and then click Never Block Sender. Add ipa.co.uk and .uk to your Safe Senders list.How to add our domain name ( ipa.co.uk and .uk) to your Safe Senders List. To ensure your important email messages from and are not filtered into your Junk/Quarantine/Clutter Mail folder, follow the appropriate instructions. The IPA uses dotmailer to send all marketing emails and SendGrid to deliver our website transactional emails.