Some copyright law, aiui:
Copyright is a collection of rights vested usually in the creator of an original work, including the right to prevent unathorised copying, moral rights, etc.
Rights under copyright are statutory rights, ie rights granted by Acts of Parliament, and these cannot be abandoned (in the UK that is - in the US the position is ... unclear, though there is some 7th Circuit (California) precedent to the effect that they can be, which is against general principles of law. The Supremes have not yet made a ruling either way).
In general, for written works, if there is no clear written copyright agreement between the publisher and the author of a magazine article, then who owns the copyright in a pre 1988 work depends on whether the article was commissioned. If it was not commissioned, ie not written to order for a fee, probably with the publishers suggesting the subject, or made in the course of employment, then the author owns the copyright.
Verbal agreements cannot to change that - copyright cannot be assigned (ie when the owner of the copyright changes) except in writing. Rights under copyright may however be granted by a verbal agreement, though the Courts would need some convincing and the grant would almost certainly have to be a consideration in a contract (eg the author got paid) to be enforceable today if the rights are of value.
If it was a commissioned work then the magazine _may_ own the copyright - amongst other things, it depends on when the article was written, as copyright law has changed over the years. However since 1988 the law has moved away from this position (to the "sweat of the brow"! position) and first copyright in commissioned works created after then is the property of the creator, not the commissioner, unless there is a written agreement otherwise.
However first copyright in works created "in the course of employment" was and remains the property of the employer. I do not know whether this is applicable to any ME/MEW articles - copyright in a full-time staff member's work for instance would be the property of the publisher.
In general, British Courts will now assume that submitting an uncommissioned article pre-1988 for free or paid publication in a UK printed publication gave the publisher only First British Serial Rights (paper), and no other rights, unless there is written evidence to the contrary, or evidence that the article was commissioned or made in the course of employment (and the Courts will sometimes do so even when there is evidence to that effect, under the "sweat of the brow" doctrine).
As I understand the situation few if any ME/MEW articles were commissioned or created in the course of employment, and it seems to me doubtful that Magicalia owns any copyrights, or any rights under copyright (which is not the same as owning the copyright) other than first british serial (paper) publication and any rights granted in written agreements between the authors and the publishers.
It seems to me to be extremely doubtful that Magicalia _could_ legally provide copies of articles on the internet, certainly not without the grant of further rights under copyright (which are not the same as copyright itself) from the authors.
It also seems very doubtful to me that Magicalia have any authority to assert any rights other than the rights mentioned above. Doing so "on behalf of the authors" seems a legal nonsense without the agreement of the authors.
Copyright in email is a bit vague, but works approximately like this: if someone sends me an email they retain the copyright to the words, but I have the right to tell people that they sent me a message and what ideas it contained - but strictly I do not have the right to quote it in full as the words (the "expression") belongs to them.
However damages* under breach of copyright are related to the lessening of the ability of the copyright owner to make money from from publishing it himself, so unless it was eg a poem or of other artistic merit it is doubtful that any tort was committed by quoting it in full, as no lessening of his ability to make money took place, and the writer could not sue for damages.
*ignoring moral rights
It is generally supposed that email sent to a public list like this one can be quoted in full, though there may be exceptions, but you are unlikely to be successfully sued unless it is an mp3 of the latest and greatest pop hit or suchlike.
For my scientific papers I usually grant the publishers a 3-year exclusive world printed rights, plus 3-year exclusive world electronic rights, although I retain the right to publish them electronically on my own webpage and to give free printed copies to colleagues/friends etc during those 3 years. They cost £18 in electronic form from the publishers, £30-odd in printed form as part of a book, and £3 for a photocopy from the British Library. Go figure. I don't get any of that.