hermes-skills/skills/email/email-sender-formatting/references/recipient-pitfalls.md

SMTP Recipient Pitfalls

Last updated: Jul 10, 2026

Valid Recipient Address — Critical

The ONLY valid recipient for Germaine is g@germainebrown.com.

• g@germainebrown.com — ✅ 250 Accepted by MXroute
• germaine@germainebrown.com — ❌ 550 No such recipient here
• g@iamgmb.com — ❌ 550 No such recipient here
• germaine@itpropartner.com — ❌ 550 No such recipient here

The MXroute Exim server at mail.germainebrown.com:2525 rejects any address that doesn't have a mailbox on the server. Only shonuff@germainebrown.com (sender) and g@germainebrown.com (recipient) have mailboxes.

Always BCC shonuff@germainebrown.com on every outbound send — partially as a record, partially so the shonuff-inbox-collect.py can detect replies.