They renamed mens quintembris and mens sextembris to July and August. Originally, The Roman year started on the spring equinox at 1 March, and September–December were indeed the 7^th—10th month of their year. Spring equinox shifted over the centuries due to an incorrectly calculated length of the year. I forgot why they shifted New Year to 1 January and who did this.

Different providers have different spamfilters, different rules regarding html mails, attachment file size, use of tls, policies regarding exspired certificates, and might have different log in procedures, so yes, if there are problems the question which providers are involved.

Widespread in Germany.