Hi Tim No, ICMP is not being blocked. At least not on the IMAP server side.
Yes, IPv6 in use, but the affected customer mostly don't use IPv6 and don't use mobile networks. But since we increased to 50 connections per user+ip the complaints are almost gone. As I understand, Outlook 2016 opens one connection per IMAP folder to get instantly notified (was this via IDLE command?) when something changes in the folder. So maybe a coincidence and many customers started exceeding the 20 folder limit? Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
