Can't send mails

[baszoetekouw]

Sending of mail fails in the latest release. After creating an invite, the logs say:

2015-11-17 10:04:06] request.INFO: Matched route "admin.subscription.new" (parameters: "_controller": "AppBundle\Controller\Admin\SubscriptionController::newAction", "_route": "admin.subscription.new") [] []
[2015-11-17 10:04:06] security.INFO: Populated SecurityContext with an anonymous Token [] []
[2015-11-17 10:04:06] security.DEBUG: Write SecurityContext in the session [] []
[2015-11-17 10:04:06] app.ERROR: Exception occurred while flushing email queue: Expected response code 250 but got code "501", with message "501 <<>>: missing or malformed local part " [] []

tcpdump shows that it indeed sends:

MAIL FROM:<<>>

to the MTA.

[baszoetekouw]

Particularly note the <<>>. This should be a single <>.

[relaxnow]

@baszoetekouw I can't seem to reproduce this locally, does your installation have a app/config/parameters.yml with mail_from set?

[baszoetekouw]

This is a bug in Swiftmailer, see swiftmailer/swiftmailer#705.

Workaround in commit 84f3396.