Thread: SMTP settings give 550 Unexpected response from SMTP server during handshake.
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Old 01 Apr 2020, 13:55
snakes1100 snakes1100 is offline
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Join Date: Dec 2001
Real name: Anthony
Your server sends the helo, not vbulletin, its a server issue.

What smtp server are your trying to connect to?

Is this a dedicated server your site is on?
__________________
1. Adjust File Upload Limits
2. Implementing CSRF Protection in modifications
3. Adjust PhP Variables for Memory Allocated Errors
4. open_basedir issues, try this.
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