There are several reasons why unusual attachments and links should be avoided in email marketing:
Security Concerns: Unusual attachments like .exe files can be perceived as malware or viruses, making recipients hesitant to open them. Deliverability Issues: Email service providers are likely to flag emails with unusual attachments or links, reducing the chances of your email reaching the inbox. User Trust: Unexpected file types or strange links can erode trust, leading to lower engagement rates and higher unsubscribe rates.