MailTopic: Mail
"I am receiving '530 SMTP authentication is required' errors for all incoming emails from external domains (Gmail, iCloud). My DNS (SPF/DKIM) is configured according to your specifications and MX records point to your servers. Please verify if my domain has an 'Open Relay' restriction incorrectly applied or if you can whitelist my incoming traffic to bypass this SMTP authentication requirement.
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| Author | Topic: Mail |
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ivancerezomd Joined: 2025/2/15 
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Mail2026年7月8日 23:29
"I am receiving '530 SMTP authentication is required' errors for all incoming emails from external domains (Gmail, iCloud). My DNS (SPF/DKIM) is configured according to your specifications and MX records point to your servers. Please verify if my domain has an 'Open Relay' restriction incorrectly applied or if you can whitelist my incoming traffic to bypass this SMTP authentication requirement.
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It is currently 2026年7月9日 6:40 US Mountain Standard Time
2026年7月9日 6:40