Everything looks ok in the log. Which users from the list didn't receive the email?

At least BCC became CC

I'll attach another log without quotes shortly.

Does your mail server support bcc? I sent to addresses with dots in cc and bcc to gmail with no problems. I even put quotes around some addresses like you have.

Just sent mail to myself and BCC'd to colleague through Outlook
He got it and does not see himself as a recipient

Anyways, I see Ext plugin adds it as explicit RCPT, this should not happen if the person is BCC'd, does it?

I meant DavMail, not Outlook. See "How SMTP actually works" on http://stackoverflow.com/questions/2750211/sending-bcc-emails-using-a-smtp-server. Based on that, you would still see the BCC person as a RCPT entry with the mailserver.

Ok, I'll go take a look at DavMail source. Don't close this issue, I'll update it with non-quoted version soon

I won't close until resolved.

This actually has nothing to do with dots in the email address. It has to do with a bug I introduced that parsed the cc and bcc stuff incorrectly. I was not seeing it on the code I was using because I had already fixed it. I should have run earlier with the released version of the code. Should have a fix in the next version.

Code changed in jenkins
User: Alex Earl
Path:
src/main/java/hudson/plugins/emailext/EmailRecipientUtils.java
http://jenkins-ci.org/commit/email-ext-plugin/cea631c421b7964ba710d21c3a4131d7a881f739
Log:
Fix JENKINS-28444

Fix incorrect check for > 0 size on the bcc an cc lists.

Oh!
Very sorry for not providing logs.
Suddenly got very sick.

Thanks for sorting this out anyways!