On Fri, January 23, 2015 09:23, [email protected] wrote: > James > > On Fri, Jan 23, 2015, at 06:16 AM, James B. Byrne wrote: >> We have had to whitelist some of our larger clients because of this >> very issue. We had one case where the same message was retried from >> at least five different IPs apparently because it was sent from a >> BlackBerry. > > In that case using the Blackberry servers I assume? >
To the best of my ability to recall the mail was coming from/through servers in the user's own domain, which is a quite large multi-national. We never saw this problem with any other user of theirs. Of course, having white listed the domain we are unlikely to ever again. The only thing that we could discover that marked this user out from all the rest was that their messages which exhibited this problem all claimed to be sent from their BlackBerry. When the same user had sent messages from some other location or device, presumably their office workstation, they never had this problem when grey-listed. At least, none that we could detect from the logs. They were an infrequent correspondent which is why they were repeatedly grey-listed. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:[email protected] Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3
