Change of the authorization method for selected mail clients

Since the CRAM-MD5 authorization method is considered to be out of date, we are deactivating it on the server.

Below is an overview of mail clients that support this type of authorization and a guide on how to choose a more reliable method of authorization.

You don't have to do any changes in the email client MS Outlook, because it doesn't support the method of authorization CRAM-MD5.

Right click on the account name in the left menu and select Settings.
At the bottom right, click the "Edit SMTP server..." button on the "Outgoing server (SMTP):" line.

The setting Authentication Method "Encrypted password is inappropriate.

Select Connection security "STARTTLS", Port "587" and Authentication Method "Normal password".
These settings are correct
Save the settings

Apple Mail

Click Mail and then Preferences from the main menu of Apple Mail. 

This will bring up a preferences screen where you should then select the Accounts tab.

Choose the Server settings tab and check the settings.

Uncheck both “Automatically manage connection settings” checkboxes and check Authentication.

Authentication Method MD5 Challenge-Response is obsolete and thus inappropriate

Set the authentication for IMAP and SMTP server to Password.


Go to Settings and choose Accounts and Passwords 

Tap on your account

Tap on SMTP server

Tap on

Authentication Method MD5 Challenge-Response is obsolete and thus inappropriate

Select Authentication Method "Password"

The Bat!
Choose menu Account > Properties [Ctrl+Shift+P].

1. If you are not using more SMTP servers or more configurations (Use SMTP servers On-The-Go), check only settings Authentication ... (1.)

2. If you are using more servers (configurations), check also settings of active servers in Configure... (2.)

eM Client
In eM Client no changes in settings are needed. The client chooses another authorization method by itself, if CRAM-MD5 is not available.

If you are using the email account for authoriazion on a printer, contact our customer support.

Currently, the configuration of the smtp server is set up in a way, that it still offers CRAM-MD5 authorization, however it is not available for certain domains. Some printers use a method based on the offered methods of authorization by the smtp server (currently LOGIN, PLAIN and CRAM-MD5). After CRAM-MD5 is not offered by the smtp server the 4th of August 2021, the printer will instead automatically use the LOGIN or PLAIN method. This affects the following printers

Develop Ineo+ 220
HP Color LaserJet MFP M477fdw
HP Color LaserJet Pro MFP M479fdw
HP LaserJet MFP M426fdw
HP LaserJet Pro MFP M521dn
Konica Minolta c250i
Konica Minolta Bizhub C35
Kyocera FS-3140MFP+
Kyocera 4500i
Kyocera 250ci
Sharp MX-266N, MX-266NV, MX-B350W
XEROX Workcentre 7120
Xerox Workcentre 6515DN MFP
Xerox 5955

If you are using some of the printers above, after the 4th of August 2021 no changes of settings will be needed.

If you are using the WP Mail SMTP plugin for sending emails, after the 4th of August 2021 no changes of settings will be needed.

If you are using PHPMailer, you don§t have change any settings, PHPMailer automaticaly selects other type of authorization.