... to fix the problem(s) you need to re-register the files with the MSN program. ... regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll. The dialog should look like this...
http://www.cknow.com/faqs/Why/HavingaMSNMAILHOSTDOWNLOA.html

... to fix the problem(s) you need to re-register the files with the MSN program. ... regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll Click on OK or press the Enter key.
http://www.helpero.com/Questions-and-answers/Internet/Downloads/My-msn-downloadhost-will-not-open-What-can-i-do_7924.html

... couldn't find any settings that looked out of the norm for either program. ... regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll (updated 05-23-2007) Downloadhost error message within ...
http://www.md4pc.com/questions/99.htm

1; 2; 3... 6; 7; 8 ... I searched and it's sitting right where it's supposed to be at C:\program files\msn\msncorefiles\mailui.dll I ...
http://forums.delphiforums.com/n/pfx/forum.aspx?tsn=1&nav=messages&webtag=ab-foaf&tid=5175

... is unable to open MAILHOST files you may not have the appropriate program ... in the Start menu on windows), and then typing: regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll.
http://www.liutilities.com/products/winbackup/filextlibrary/files/MAILHOST/

1; 2; 3... 6; 7; 8 ... I searched and it's sitting right where it's supposed to be at C:\program files\msn\msncorefiles\mailui.dll I ...
http://forums.about.com/n/pfx/forum.aspx?tsn=1&nav=messages&webtag=ab-foaf&tid=5175

Program and/or Extension Function [What's This?] Company [What's This? ... regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll...and then click on OK or press the Enter key (use ...
http://filext.com/file-extension/mailhost

I like what the program does and would like to use it but just need a way to ... This works for all msn mailhost errors: regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll
http://forums.pcpitstop.com/lofiversion/index.php/t67903.html

... SPYWAR~1\tools\iesdsg.dll O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\Program Files\MSN Apps\ST ... C:\Program Files\MSN\MSNCoreFiles\msn.exe C ... object "mailui.dll ...
http://forums.pcpitstop.com/lofiversion/index.php/t97901.html

... 1\msn\msncorefiles\mailui.dll This should restore the Mailhost file and allow MSN to communicate with the mail server again. Also see the related .DOWNLOADHOST entry.
http://www.fileinfo.net/extension/mailhost

... program a few days ago. Now I cannot access my e-mail. I have tried to go to search and run. I then type in the suggested "regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll" and ...
http://qna.live.com/ShowQuestion.aspx?qid=CCFA50657A834E8E9394E15416EE1CA3

i have allowed this program through Windows Firewall What should i do now please ... Type in: regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll AND/OR Click Start
http://qna.live.com/ShowQuestion.aspx?qid=7FA9130CDB2E4A58A9E0D204055A3F37

... 0.329, Virus Scan: 11.0.213, Firewall: 8.0.203, Site Advisor: 1.6.3459 ... Problem solved by MSN. Told me to run regsvr32 "c:\program files\msn\msncorefiles\mailui.dll".
http://community.mcafee.com/archive/index.php/t-184691.html

... 0.329, Virus Scan: 11.0.213, Firewall: 8.0.203, Site Advisor: 1.6.3459 ... Problem solved by MSN. Told me to run regsvr32 "c:\program files\msn\msncorefiles\mailui.dll".
http://community.mcafee.com/showthread.php?t=184691

2- Type regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll in the text box, and then ... I get the msn.mailhost error, I did the "regsvr32 c:\progr~1\msn\msncorfiles\mailui.dll" and ...
http://msmvps.com/blogs/belfiore/articles/15036.aspx

... fix promoted on several sites does not work--"regsvr32c:\progra~1\msn\msncorefiles\mailui.dll" ... value name=" Setup" type=" 1 "> C:\\Program Files\\CA\\AdvantageDatacomServer5.0 ...
http://safetycenter.spaces.live.com/blog/cns!8A533CD69529D377!132.entry?&_c02_owner=1%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f&commentPage=Next&commentPH=cns!8A533CD69529D377!918

The fix promoted on several sites does not work--"regsvr32c:\progra~1\msn\msncorefiles\mailui.dll" ... I have used the program and to date, have had no ill effects. My computer boots ...
http://safetycenter.spaces.live.com/blog/cns!8A533CD69529D377!132.entry?&_c02_owner=1%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f%3f&commentPage=Previous&commentPH=cns!8A533CD69529D377!865

C: > program files > msn > msn core files > msn DB   ... regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll
https://forums.qwest.com/qwbb/board/message?board.id=email&view=by_date_ascending&message.id=83

C: > program files > msn > msn core files > msn DB   ... regsvr32 c:\progra~1\msn\msncorefiles\mailui.dll
https://forums.qwest.com/qwbb/board/message?board.id=email&thread.id=83

C:\Program Files\MSN\MSNCoreFiles\mailui.dll Windows 2000/XP C:\Windows\System32\regsvr32 ... 1) Open MSN 8.5 2) Click on Help & Settings 3) Click on Status and Support
http://www.geocities.com/tpslctshelp