1 Topic by Rashef

  • Rashef
  • Rashef
  • Member
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  • From: London
  • Registered: 2009-05-22
  • Posts: 93

Topic: 550 5.7.1 Sender ID (PRA) Not Permitted

iRedMail with MySQL backend.
I get this error sending from internal domain A to external domain B...

What to check?

thanks & regards

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Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
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  • Registered: 2009-05-06
  • Posts: 31,127

Re: 550 5.7.1 Sender ID (PRA) Not Permitted

Looks like SPF or something similar, not sure.
It's better to contact admin of domain B to solve this issue.