Thank Pete, but it seemed not the case. From ListServ log, user posted same HTML email to two lists: 23 Oct 2012 14:41:55 Processing file 244315 from [log in to unmask] 23 Oct 2012 14:41:55 Processing mail from [log in to unmask] for ISRAEL-STUDIES-NEWS 23 Oct 2012 14:41:55 Distributing mail ("ISRAEL-STUDIES-NEWS") from owner-israel-studies-news@NEWLISTS.SSCNET.UCLA.EDU... 23 Oct 2012 14:42:57 Processing file 244352 from [log in to unmask] 23 Oct 2012 14:42:57 -> Removing unwanted MIME message parts... 23 Oct 2012 14:42:57 Processing mail from [log in to unmask] for INTLALL 23 Oct 2012 14:42:57 Distributing mail ("INTLALL") from owner-intlall@NEWLISTS.SSCNET.UCLA.EDU... It was ListServ which removed MIME. And once again, both lists are the same, and users could post to both lists with HTML - except [log in to unmask] posted to INTLALL. I just realized that I should check the log. Shinn On 10/23/2012 6:37 PM, Pete Weiss wrote: > What mail client is user using? > > Thunderbird can strip HTML based on address book parms per entry which interacts with Tools / Options > / Composition / General / Send Options. > > Don't know about other MUAs. > > On 10/23/2012 18:54, Shinn Wu wrote: >> Any one can solve this puzzle? Thank. > ############################ > > To unsubscribe from the LSTSRV-L list: > write to: mailto:[log in to unmask] > or click the following link: > http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1 ############################ To unsubscribe from the LSTSRV-L list: write to: mailto:[log in to unmask] or click the following link: http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1