SMTP-failure: [554] 5.7.1 <DATA>: Data command rejected: Unverifiable sender.

[Nikolai Maziashvili]

Error code 554... if i can remember correctly it has something to do with that particular sender being blocked... spam?

> Date: Sat, 22 Nov 2014 17:03:16 +0100
> Subject: SMTP-failure: [554] 5.7.1 <DATA>: Data command rejected: Unverifiable	sender.
> From: yamakasi.014 at gmail.com
> To: users at lists.kolab.org
> 
> Hi guys,
> 
> What can cause this issue when sending an email from Roundcube when I
> use an associated domain ?
> 
> I used the Multidomain howto but I still get this on sending an email.
> 
> SMTP-failure: [554] 5.7.1 <DATA>: Data command rejected: Unverifiable sender.
> 
> 
> Any idea on this ?
> 
> Cheers,
> 
> Matt
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