My client has been using the email gateway for some years now.
About 6 months ago my client reported that emails would not send, they received a message saying Cannot send this item.After investigating I found it related to long URL's, once an email chain gets so long the links block the reply emails being sentWe use TOC via the email gateway, this is the cause of the issue as it rewrites the URL every time an email is sent even though it rewrote them previously.MS released a fix for this in April:https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-outlook-cannot-send-this-item-email-bug/This didn't resolve the issue my client is having, the fix may have been for 365 TOC.I have logged cases with support but not got anywhere, has anyone else seen this problem?
I tried searching for your Case ID, but I couldn't find it under the email you used to register to the community.
I did found 3 cases related to this, however, they were about users having…
Thank you for contacting the Sophos Community.
May know the Case ID(s) you have logged, to see what has been done.
Hi Emmanuel, Nothing has been done that I know of, I didn't get the impression that the issue was understood.
I did found 3 cases related to this, however, they were about users having a mail signature, that was causing the re-written, it was suggested to add this signature to the Central Email > Settings > URL allow list.
I am not sure if this would be also your case.
Thanks for this, I have added them, hopefully, that will resolve the issue! I will mark it so if it does.