Btinternet messages from gmail arriving in a mime format

[miltonlea]

Hi if I send a gmail to more than one person it arrives as a mime format to btinternet accounts only. What’s going on!!!!

[licquorice]

See

https://community.bt.com/t5/Email/Emails-sent-via-Gmail-sending-BCC-list-to-BTmail-addresses-gets/td...