Yes, if the IP associated with your website (xyz.com) is listed in spam, it can significantly impact the delivery of your emails, even if your mail server's IP (mail.xyz.com) is clean. Email providers often use IP reputation to filter out spam, so having your website's IP flagged can lead to your emails being marked as spam or blocked altogether. Consider providers like SMTPget, Mailgun, SendGrid, iDealSMTP or Amazon SES, known for their reliable email delivery services and good IP reputation management.
