Can InterServer web-hosting email be used for unrestricted newsletters or cold outreach?
The short answer
No. Included mailboxes do not imply unrestricted campaign sending. InterServer explicitly restricts cold-emailing and requires double opt-in and unsubscribe mechanisms for mailing lists. Check its policy and sending limits before choosing hosting for email-heavy work.
In more detail
InterServer's terms distinguish ordinary email use from prohibited spam and explicitly restrict cold-emailing. Mailing lists must meet double opt-in and unsubscribe requirements. The presence of mailboxes in a web-hosting package is therefore not approval for any audience or sending pattern.
For selection, separate customer correspondence, application notifications and marketing campaigns. Estimate the peak sending rate for each, including retries after an outage. An online store can generate a sharp burst of transactional mail even when its average daily volume appears modest.
Our recommendation for regular campaigns is to evaluate a dedicated email delivery service that explicitly supports the intended use. Confirm its consent, suppression and unsubscribe workflow as well; changing providers does not make an unsuitable recipient list acceptable. Keep important order or password-reset messages from competing with campaign traffic where possible.
Before migrating, ask InterServer for the current sending quota and treatment of your exact workflow. Test delivery and failure handling with a small permitted set of recipients. Choose the website plan for the site itself, while making an explicit decision about how its mail will be sent.