[SOLVED] 450 4.7.25 Client host rejected: cannot find your hostname,

killmasta93

Renowned Member
Aug 13, 2017
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Hi,
I was wondering if someone could shed some light on the issue im having. Currnelty have disabled smtp helo checks, and greylist disabled and SPF disabled also. but i keep getting the

Code:
450 4.7.25 Client host rejected: cannot find your hostname,


any ideas?

Thank you
 
i find that sometimes postfix does not get restarted when changing things in the web-interface (the last thing i remember that failed to restart was when enabling/disabling SPF).

i usually resort to changing the smtp-banner as well, which
- seems to restart postfix
- allows me to do a simple check whether postfix was indeed restarted (if it shows the new banner, the restart was succesfull)
 
Hi,
I was wondering if someone could shed some light on the issue im having. Currnelty have disabled smtp helo checks, and greylist disabled and SPF disabled also. but i keep getting the

Code:
450 4.7.25 Client host rejected: cannot find your hostname,


any ideas?

Thank you

Seems your public DNS entries are not set correctly?
 
Please check your settings on "Configuration/Mail Proxy/Options: Reject Unknown Clients / Senders"
 
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