Emails to mts.net or mymts.net users not receiving - Club 5265 and 643557

We have had emails sent through FTH to the following addresses which have not been received by the members. We do not get a message about it, and the addresses are correct. Clubs 5265 jack44@mymts.net, billb111@mymts.net, and leclerc@mts.net (though she has since changed to a gmail address and it seems to be working. Club 643557 fernando@mymts.net  With all these members, Itried to remember to forward the agendas to ensure that they received them. Recently Toastmasters International sent me a notification that Jack Gillespie a member of 5265 and a Past President of Toastmasters International has an invalid email address and they are requesting that we follow up and get a new address in the system for him. I have been in contact with Bell MTS and they are trying to solve the issue. They asked me to ask you and Toastmasters International the following question - Can you give me a list of IP addresses that Toastmasters International and FreeToastHost are using to send out emails? Right now, they say that the 50.19.253.65 is working OK from their research. If they have a complete list, they can check them all. Can you please help me? 

Catriona wrote:

Can you give me a list of IP addresses that Toastmasters International and FreeToastHost are using to send out emails? Right now, they say that the 50.19.253.65 is working OK from their research. If they have a complete list, they can check them all. 

50.19.253.65 is the correct and only IP address for FTH.

We cannot help with anything related to toastmasters.org. You will have to contact them.

Concerning the FTH email forwarding system; The affected members should whitelist; server@toastmastersclubs.org and agenda@toastmastersclubs.org.

Please review this document;

support.toastmastersclubs.org/doc/item/e...embers-receive-email

Thank you very much. I appreciate your quick reply and verification of the IP address for Free Toast Host. I am hopeful that Toastmasters International will send me their IP address so we can clear this issue up from a broader perspective. I appreciate your links to the white listing as well, which I will share if we cannot get it broadly looked after by BellMTS. Thanks so much!
Catriona