请大家帮我看看邮件不能收发的问题

arnzn

最近深圳好象很多国外的邮件地址都不能收发,我用NSLOOKUP查询得到如下信息,哪位大哥帮忙看看问题出在那哪里.多谢!<br>
primary name server = ns1.dotzup.com<br>responsible mail addr = hostmaster.uc-online.com<br>serial = 1148451610<br>refresh = 16384 (4 hours 33 mins 4 secs)<br>retry = 2048 (34 mins 8 secs)<br>expire = 1048576 (12 days 3 hours 16 mins 16 secs<br>default TTL = 2560 (42 mins 40 secs)