[kazinator]

But the line "We are happy to welcome you to our family." is not anywhere near the line limit. There is something else going on here, like perhaps the whole thing actually being an HTML MIME attachment, perhaps? IN which it is like

  ... lots of text ... <br>We are happy to welcome you to our family.<br>

or whatever. But if you blindly split HTML into lines, it will break tags.

[the_real_tjaart]

This was just an example, sorry for not providing a real example that had the exact character count.

[canucker2016]

and probably the vast majority of the people receiving those broken HTML emails will realize there's something wrong with the email's formatting, chalk up the problem to a company that can't be bothered to correctly write a legible email and lower the company's competence rating, and go on to the next email.

the company is just blindly unaware to their minor problem.

[dylan604]

rarely do I hold the sins of an incompetent marketing department against the company itself. otherwise, there'd be no company left deemed as competent because all marketing departments are incompetent.

[Aloisius]

Quoted-printable encoding with soft breaks would allow blind splitting of lines without breaking HTML tags.

While quoted-printable is supposed to have a max line limit of 78 characters including CRLF rather than 1000, email clients tend to be permissive.