SMTP - Errors on sending mails since second project

[anonymous]

I get the error after modifying a ticket or after creation of a user with the ​AccountManagerPlugin that the SMTP Connection unexpectedly was closed.
I will try to give you guys as many info that I can give.

I have this issue since I backed up a project to a backup folder and coppied this backuped folder as a new project folder so that I now have 2 projects. (Because the main structures of the wiki and so on fits very well into the other project - so I thought only change the required values)
Than I executed
tracd --port 8000 ./project1 ./project2
On the site I then had a info that I should run trac-admin /<pathTo>/project2 upgrade.
I did that and than got the message that it would be better to upgrade the wiki content to… did it, too.
Than I reconfigured the trac.ini of project2 like the one of project1 but modifyied some values as I need them for project2 of course (for example [project] settings and some other but not the SMTP settings except that I changed smtp_always_bcc to other email adresses).
I should say that before having project2 the notifications worked with my notification settings but since the second project none of the 2 projects have working notifications.

My [notification] settings:

admit_domains = 
always_notify_owner = true
always_notify_reporter = false
always_notify_updater = true
ambiguous_char_width = single
batch_subject_template = $prefix Batch modify: $tickets_descr
email_sender = SmtpEmailSender
ignore_domains = 
mime_encoding = none
sendmail_path = sendmail
smtp_always_bcc = email1@domain.de, email2@domain.de
smtp_always_cc = 
smtp_default_domain =
smtp_enabled = true
smtp_from = projects@MyDomain.de
smtp_from_author = false
smtp_from_name = ProjectName2
smtp_password = examplePW
smtp_port = 587
smtp_replyto = projects@myDomain.de
smtp_server = smtp.live.com
smtp_subject_prefix = __default__
smtp_user = projects@galexa-media.de
ticket_subject_template = $prefix #$ticket.id: $summary
use_public_cc = false
use_short_addr = false
use_tls = true

Additional stuff:
I don't think that the AccountManagerPlugin has to do something with it because if I turn of the notification settings of the plugin I can create users successfuly again but the ticket modify notifications are still in problem than…