Created attachment 1236 [details]
Proposed text to make it clear that an email is coming and that it might be in the spam folder

Here is a proposed solution (see attached screenshot)

In our doc sprint today about 75% of the new members found their account e-mail in their spam folder.

Created attachment 1255 [details]
Another proposed text for email confirmation section

Besides the proposed text at the point of the Contributor Agreement, we might want something at the point where user is informed that an email is coming.

Here are the bulk sender guidelines for gmail:

https://support.google.com/mail/bin/answer.py?hl=en&answer=81126

Here is a personal email sender context form, which results in a "Non Bulk Sender Contact Form" if you answer the questions right:

http://support.google.com/mail/bin/static.py?hl=en&ts=1228275&page=ts.cs&contact_type=non_bulk_send

Who can check that we are following guidelines and/or provide a dated copy of the full rejection message?

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Also, besides the proposed text on the who can update the Special:UserLogin page message at the point of the Contributor Agreement, we might want something at the point where user is informed that an email is coming. See attachement "Another proposed text for email confirmation section" - maybe something less gaudy than this, but a callout box that reminds user to check spam.