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Question

invalid credentials or connection settings

P
Userlevel 2

Hello

I have 4 VM on 4 different physical servers with Veeam Backup&Replication community edition v12.1.56.


In my system, I have a VM under debian 12 which is used as Postfix SMTP relay for all my servers. Internally, everything goes through port 25 and all my servers send mail to this relay without identification or password. The relay then sends everything to my dedicated office365 mailbox.

In less than 1 day, 2 of my Veeam VMs stopped sending me mail.

So every time I run the test mail, I get the message: Unable to connect to SMTP server because of invalid credentials or connection settings.

I've compared the smtp configuration with that of the 2 servers that are still working, apparently I haven't seen any anomalies and everything is identical. Even firewall configurations are perfectly identical between servers:

SMTP Server (Basic authentication)
SMTP server: IP of my SMTP server
From: mail address of my server admin
To: my mail address
port 25
timeout 100000

The only difference is that the two servers that no longer send mail are running Windows Server 2012R2.

Finally, in the SMTP Relay server logs, there is absolutely no trace of any attempt to receive a request to send mail. So the blocking is really at Veeam or server level, and not at SMTP server level.

If you have an idea or can help me solve this problem, I can give you all the information you need.

Thank you in advance.

11 comments

Chris.Childerhose
Userlevel 7
Badge +20

It seems odd that email would stop working all of a sudden when it did work.  If you are not using credentials to your forwarder then it should work but as you indicate it is not.  Are you able to set up credentials and test them to see if that fixes it?

This is the email setup page from Veeam help - Configuring Global Email Notification Settings - User Guide for VMware vSphere (veeam.com)

The only other thing I can think of is the OS being Win2012R2 which is fairly old now.  The other servers that work are they the same or newer for OS?

Chris Childerhose - VMCA2022 | VMCE2023 | Veeam Vanguard 7* | Veeam Legend 3* | vExpert 5* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
E
Userlevel 4
Badge +2

maybe something you obviously already checked, windows updates?

P
Userlevel 2

As I said, the two VMs that no longer work (only in terms of sending mail, as the backup works perfectly), are under 2012R2.
The others are running under 2019 standard
But then, it's only sending mail, so I don't really see what's the problem.
Both 2012R2 servers are up to date.

and yes, I followed the instructions on this page https://helpcenter.veeam.com/docs/backup/vsphere/general_email_notifications.html?ver=120 perfectly, step by step.

 

E
Userlevel 4
Badge +2

sorry, what i meant was, are backup installed recently? Dit you try to re apply the email settings in configuration menu? 

Chris.Childerhose
Userlevel 7
Badge +20

Well then these should technically work and send email still.  I know you are using community edition, but might be best if you can contact Support to see what is happening.

Also try to apply the email settings again as noted by Epicfailing.

Chris Childerhose - VMCA2022 | VMCE2023 | Veeam Vanguard 7* | Veeam Legend 3* | vExpert 5* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
P
Userlevel 2

sorry, what i meant was, are backup installed recently? Dit you try to re apply the email settings in configuration menu? 

The servers did their backups this weekend, just that I no longer receive notifications of backups and configuration backups.
The VMs have now been installed for a little over 2 years, worked perfectly until about 3 weeks ago, and I updated them to the last version last week (thinking that would solve the problem).
I deactivated email sending, rebooted the vm and reactivated email sending, on the old version it worked randomly (and when it worked, the next day it didn't), on the new version it doesn't work at all.

Chris.Childerhose
Userlevel 7
Badge +20

Are you able to set up authentication with your email relay server to test that?  If not at this point support is the best bet to help resolve this.

You can also check the logs here to see if anything within there gives an idea as to what the issue is - C:\ProgramData\Veeam - unsure which log file has the email stuff but will check my servers and post back.

Chris Childerhose - VMCA2022 | VMCE2023 | Veeam Vanguard 7* | Veeam Legend 3* | vExpert 5* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
P
Userlevel 2

even if I have a community version, will the official veeam support take my request?

I've had a good look in the veeam logs and apart from the famous message ( Unable to connect to SMTP server because of invalid credentials or connection settings.), I don't have much more to give in the way of details, and yet I'm used to dissecting linux-type logs.

 

Chris.Childerhose
Userlevel 7
Badge +20

even if I have a community version, will the official veeam support will take my request?

I've had a good look in the veeam logs and apart from the famous message ( Unable to connect to SMTP server because of invalid credentials or connection settings.), I don't have much more to give in the way of details, and yet I'm used to dissecting linux-type logs.

 

Yes you can submit a ticket for support but the response is best effort unfortunately.  You might also try to search the forums to see if there are any posts there that are helpful - https://forums.veeam.com

 

Chris Childerhose - VMCA2022 | VMCE2023 | Veeam Vanguard 7* | Veeam Legend 3* | vExpert 5* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
P
Userlevel 2

Thank you
I will contact them to see if they can help me.
Unfortunately I've already search in the official forum but haven't found anything.

I'll let you know if I find a solution.

Chris.Childerhose
Userlevel 7
Badge +20

Thank you
I will contact them to see if they can help me.
Unfortunately I've already search in the official forum but haven't found anything.

I'll let you know if I find a solution.

Sounds good.  Keep us posted and I am sure if others have more details they will post here.

Chris Childerhose - VMCA2022 | VMCE2023 | Veeam Vanguard 7* | Veeam Legend 3* | vExpert 5* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech

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