Hi team,

The default setting for Mail Domains is "Reply error" this is not industry best practice, would you please consider changing this in future updates?

"Ignore and drop" (Recommended Default)

• Most secure - prevents information disclosure
• Reduces server load - no bounce processing
• Prevents backscatter - doesn't send replies to potentially spoofed addresses
• GDPR/Privacy compliant - doesn't confirm email addresses exist

Why "Reply error" is Problematic:

1. Information disclosure - confirms to attackers that the domain accepts mail
2. Backscatter creation - sends bounces for spam/spoofed emails
3. Server resource waste - generates unnecessary bounce messages
4. Reputation damage - can hurt domain reputation if bounces are excessive

Modern Best Practice:

Most hosting providers and mail systems now default to "Ignore and drop" because:

• It's the most secure option
• Complies with anti-spam guidelines
• Reduces server overhead
• Prevents abuse of bounce mechanisms