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This is in reference to #615358: user@localhost no longer validates as an acceptable email address.
The problem is that Aegir, running on Drupal 6, allows an address such as "webmaster@localhost". When attempting to create a Drupal 7 site, installation fails as the address is no longer considered valid.
Comments
Comment #1
Anonymous (not verified) CreditAttribution: Anonymous commentedI appear to have fixed this in git, good idea to validate the email address anyway.
Still not convinced it shouldn't be allowed, but that isn't for here!
Comment #2
Anonymous (not verified) CreditAttribution: Anonymous commentedI'm anticipating Drama because of that disallowance of user@localhost. In which case, this is worth a read #308138: Make valid_email_address() support IDNs