Google does not let external applications connect to gmail without applying a secure procedure.It is necessary ...
-> activate two-factor authentication on Google. -> allow access to gmail through low security applications -> generate an application password at Google for this low security access -> enable IMAP access to gmail account using this app password instead of Google's
This for the practical part.However, it should be noted that this access by Webmail only gives a view of the mail received in gmail, by far not the full access given by an email client like Outlook or Thunderbird.
watch this post on the french community
Ajouter compte gmail dans webmail bluewin / Add gmail account in bluewin webmail
There is a validation step to do to authorize the link between the two mailboxes before configuring the outgoing server.Perhaps that is what causes the rejection and explains why it is "temporary".Error messages should not be taken too strictly!
Normally Gmail sends a request validation message to the email address (bluewin) and you have to click on the link it contains to validate the request.This is what is described in step 2.
Just for information the password on the web page is not the same as on the Gmail app on your device.
The password on the web interface and quite simply that of the customer area. On an application like the one you have in Gmail, the Bluewin.ch mailbox has a different password even if the server responds negatively with the correct ports, the password and perhaps the source of the problem
Server settings Swisscom recommendations for customers with a Bluewin.ch/bluemail.ch address: Note: For all information shown below, SSL must be enabled in the settings. Incoming mail server IMAP4: imaps.bluewin.ch (Port 993) (recommended by Swisscom) POP3: pop3s.bluewin.ch (Port 995) * Outgoing mail server SMTP: smtpauths.bluewin.ch (Port 465) Authentication (Device dependent) Activate password or normal Disable CRAM, Digest and SPA
* GMail only allows retrieval by POP.From the other side configure the Bluewin box to forward messages to GMail, keeping a copy in the Bluewin box. The two cases are different from IMAP operation where messages are always accessed on the main server without creating duplicates to be managed separately.
ADVICE : For an external mail, free and powerful, prefer Thunderbird, for Windows or Mac, it also allows to group all the accounts and many other practical functions