Failed to authenticate on SMTP server with username "nextcloud" using 1 possible authenticators. Authenticator LOGIN returned Expected response code 235 but got code "535", with message "535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6 ".）

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1

Failed to authenticate on SMTP server with username “nextcloud” using 1 possible authenticators. Authenticator LOGIN returned Expected response code 235 but got code “535”, with message "535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6 ".）

The user name and password have been confirmed to be correct…

3

Nginxversion：1.21.4
PHP version：8.0.16
nextcloud version：24.0.1
Mysql version：8.0.24

4

They are not.

echo UGFzc3dvcmQ6 | base64 -d

:wink:

3 Likes
6

How do I use this command?How do I use this command?

7

On the command line.

8

Hi @Sanook,

so, you mean literally the OS’s command line?
Our Nextcloud is hosted by manitu.de - so, they would have to do it, right?

Thanks in advance
cm

9

If you execute the command

echo UGFzc3dvcmQ6 | base64 -d

it will display the string

Password:

That’s all :wink:

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Thanks for the reply @Sanook. I’m afraid I’m not as experienced, as you are …
So, I’m lost, still :frowning: I really would appreciate, if you please tell me/us, where to execute the command!?

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OK - in our case, the solution was quite easy (and maybe fits other users’ cases): just use the (complete) email-address as username and not (real) username itself.