@Madelwi
thanks for the contribution
>... I can no longer send emails from my alternative mail accounts. Any one has same trouble?...
" We no longer allow sending to a foreign domain, i.e. sending via smtpauths.bluewin.ch is only possible with Bluewin login credentials. "
see this discussion on the same topic in the Community in German
senden von e-mail | Swisscom Community
Response from @ChristianG Swisscom on Friday 5.7.2021
"... In June 2021, various customers received the request for the following adjustments: The customer needs to make adjustments to their email settings.???@Bluewin.ch should be used as user name for the outgoing server (SMTP) instead of ***@bluewin.ch/ foreign address. Simply put, affected clients connect to our outgoing server (SMTP) with their Bluewin email address, but send the emails with a different sender address (different Bluewin or third party address). We no longer allow this configuration. Here are the instructions: Anpassung Ihrer Bluewin E-Mail-Adresse | Swisscom Greetings Chris... "
In the same discussion thread
Response from ChristianG Swisscom from Monday 2.8.2021
"... We no longer allow sending to a foreign domain, i.e. sending via smtpauths.bluewin.ch is only possible with Bluewin login credentials. Registration only via ***@bluewin.ch and with the corresponding Bluewin password Otherwise, you will no longer be able to send the emails. You will therefore have no choice but to order an SME product. Webhosting - your server in Switzerland | SME | Swisscom Greetings Chris... "