EXCHANGE   Exchange – SMTP error: 550 5.7.1 Client does not have permissions to send as this sender


Last week I was testing the IMAP/SMTP connection of my Exchange 2013. Unexpectedly Outlook returned the following error:
Exchange - SMTP error 550 5.7.1 Client does not have permissions to send as this sender

The message does not appear completely but seems to be “550 5.7.1 Client does not have permissions to send as this sender”. Obviously the user does have the permissions (the user was the owner of the mailbox itself).


Thanks … Read more

Apache   Apache – “Size of a request header field exceeds server limit”


When trying to access to one of my published websites, the browser shows the following error:

Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.

Apache - Size of a request header field exceeds server limit

Searching on the Apache debug error traces took me to this error line:

[Thu Jul 14 11:50:18 2016] [error] [client] request failed: 
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EXCHANGE   Exchange 2013 – IMAP NTLM authentication error

Exchange 2013 can produce IMAP issues when trying to authenticate. This is a known bug in CU9 and CU10 but in my CU12 scenario also happens.

The IMAPSettings EnableGSSAPIAndNTLMAuth atribute must be set to False in order to solve the problem.


Yesterday, when one of my users asked me how to configure the email client using IMAP I realized … Read more

EXCHANGE   Exchange – Error 130 using Netbackup with DAG passive node

When I was migrating my Exchange platform from 2010, I ensured that the backups using Veritas NetBackup were also working in Exchange 2013, both against the active or passive node of the DAG, and also the granular backups


At a certain moment, the backups started to fail (thanks I am monitoring the transaction log disks free space using … Read more

POWERSHELL   Powershell – Get-Content error if filename contains brackets

I needed to get the first 5 bytes of a file using the powershell:

PS D:\> Get-Content "D:\TEST\file.txt" -Encoding byte -TotalCount 5

But for some files the Get-Content command returns the following error "A parameter cannot be found that matches parameter name 'Encoding'"

PS D:\Scripting\CORRUPT> Get-Content "D:\TEST\file[1].txt" -Encoding byte -TotalCount 5
Get-Content : A parameter 
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EXCHANGE   Exchange – “453 4.3.1 Insufficient system resources”

Today some users have reported an issue with emails that have been received with hours of delay

I've traced one of the emails on my Ironports and I've seen the following…

15 Dec 2015 13:29:38
(DCID 1061887) Delivery started for message 578750 to
15 Dec 2015 13:29:38
(DCID 1061887) Message 578750 to delayed. Reason: 4.3.0 -
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EXCHANGE   Remove Exchange database: “The mailbox database contains one or more mailboxes…”

We have moved all the mailboxes from database "PRUEBA21" to another one because we want to delete it

This powershell with no results confirms there are no mailboxes left on that database:

[PS] D:\>Get-Mailbox -Database PRUEBA21
[PS] D:\>

Now, we delete the database on the EMC or via powershell but a warning appears:

Exchange remove database error

We have no archives, no public … Read more