Yes, along with phpList, SiteGround supports other mailing list applications as well.

SiteGround customers can install and use DadaMail. This full-featured mailing list application can be installed from cPanel > Site Software > DadaMail.

Here is a short list of DadaMail's main features:

• Unlimited number of mailing lists
• Messages can be in plain text, HTML, multipart/alternative and can include attachments
• MX lookup support
• Sending mail via sendmail or SMTP
• Sending mails in batches
• Black list support
• Message archiving
• Template support