sendmail - Mailster Knowledge Base

Mails are send but not delivered

Mailster’s email delivery relies on your sending server’s response, but a “success” message doesn’t guarantee inbox delivery. Emails may end up in spam, bounce back, or face delays. Use Mailster’s Email Health Check to assess deliverability and consider changing delivery methods or servers if issues persist.

Why I get a “Could not execute:/usr/sbin/sendmail” error message?

Sendmail is a widely used mail transfer client, but ensure the path “/usr/sbin/sendmail” is correct and you have permission to use it, as shared hosts may disable this feature. For bulk mailings, consider using a dedicated email provider or a free WordPress plugin to avoid limits and errors.