Solved: cant send email with outlook

hi
we are having problem with outlook nowadays. we cant send emails among us in the office. we can send and receive emails from outside of the office but we cant comunicate in the office. and when we do test acount settings everything looks fine (it ticked all of them) but i dont receive test email. we have some other users ,with same domain name, they can send from the other office. it looks the problem is related with ISP but we didnt have this problem till last friday. we didnt change any settings and we turn off all firewalls. still got the same problem I installed Mozilla Thunderbird and it works fine with it. what is wrong with outlook
any idea?

 

Have you checked with your ISP tech support? If they have started blocking ports to reduce spam, etc. then you should have been notified that you needed to make a change in your email account settings. Check with your ISP first.

 

thanks
It disappear suddenly now we can use it probably it was because of the ISP servers.