Queued mail for delivery when sending to Hotmail Accounts

08. October 2013 · Write a comment · Categories: Hotmail, Outlook.com · Tags: , ,
We are sending emails to some Hotmail Acounts. All the mails appears as Sent but in the mail log appears as "Queued mail for delivery"

This is a part of the mail log
Oct  8 11:55:03 taniamailer postfix/smtp[23249]: F390E361DE: to=<*** Email address is removed for privacy ***>, relay=mx2.hotmail.com[65.55.37.120]:25, delay=1.4, delays=0.04/0.57/0.15/0.61, dsn=2.0.0, status=sent (250  <*** Email address is removed for privacy ***> Queued mail for delivery)

The sender's domains is tania.co and it has a SPF Record. Additionally We've have enrolled in the SenderID Program.

Can anyone give us some advise on this matter?

All the help is appreciated!!!

Best Regards,