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Full Name: Sebastian Inacker

Set FQDN for outgoing e-mail

Post by insel » Jul 02, 2014 10:04 am


How can i set a fully qualified domain name ("" instead of "backup") for outgoing e-mail notifications? I have not found an option for doing this.

I tried to set a FQDN on the windows machine, but mail is still send out without FQDN. Because of that our mail server complains: "5.5.2 <VeeamBackup>: Helo command rejected: need fully-qualified hostname".

I use Veeam on Windows 8.

Thanks for any hint,

Vitaliy S.
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Full Name: Vitaliy Safarov

Re: Set FQDN for outgoing e-mail

Post by Vitaliy S. » Jul 02, 2014 10:29 am


Not sure there is a way to change that, as Veeam backup server might not be joined to the domain, thus only hostname is used. Let me check if Veeam ONE can send backup email notification in the way you need or not.


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Full Name: Michal J.

[Feature request] Seting FQDN hostname in notifications

Post by MichalJ » May 09, 2016 7:49 am


I have a problem sending e-mail notifications from Veeam Backup & Replication. Our mail server is sending this kind of error:

Code: Select all

Helo command rejected: need fully-qualified hostname (System.Net.Mail.SmtpException) 
As you can see, our mail server requires FQDN hostname. In Windows I can only set simple hostname without dots (like "Veeam") and then add a domain name (like ""). Entire PC name is correct ("") and would meet mail server requirements, but Veeam is only sending a simple Windows hostname "Veeam" in e-mail notification. I would like to request a feature to customize hostname sent by Veeam software and force sending FQDN hostname.


Veeam Software
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Full Name: Nikita Shestakov
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Re: Set FQDN for outgoing e-mail

Post by Shestakov » May 09, 2016 9:06 am

Hello Michal and welcome to the forums.
Thanks for the feedback!

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Full Name: Doug Heckman

Re: Set FQDN for outgoing e-mail

Post by dahdco » Sep 14, 2016 2:20 pm

We essential have the same issue. We don't outright require the HELO to have FQDN but if it doesn't it's treated as suspect and if pretty much any email gets sent through the host is blacklisted automatically. It would be great to be able to have the option to force it to use FQDN.

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