You will have better luck by looking at this from a publisher level rather than at a journal or conference level. In my field, Computer Science, most if not all publications are done through the ACM or the IEEE. I know for a fact that anything published through either of these institutions can be freely shared by the author, because it's part of their copyright release. Thus, I'm confident saying that most if not all authors of Computer Science articles are freely allowed to share their work.
All ACM publications must bear the following notice:
Copyright © 2016 by the Association for Computing Machinery, Inc.
(ACM). Permission to make digital or hard copies of portions of this
work for personal or classroom use is granted without fee provided
that the copies are not made or distributed for profit or commercial
advantage and that copies bear this notice and the full citation on
the first page in print or the first screen in digital media.
Copyrights for components of this work owned by others than ACM must
be honored. Abstracting with credit is permitted.
I'm sure a lawyer could debate me on this, but it sounds to me like the ACM is not just giving the author permission, but anyone permission to make personal copies and distribute them on a per-person basis where there is no commercial incentive. This presumably includes the fostering of research collaborations.
The IEEE language in their contract is similar:
- Authors/employers may reproduce or authorize others to reproduce the Work, material extracted verbatim from the Work, or derivative
works for the author’s personal use or for company use, provided that
the source and the IEEE copyright notice are indicated, the copies are
not used in any way that implies IEEE endorsement of a product or
service of any employer, and the copies themselves are not offered for
Here the language is actually a little simpler than the ACM case, because under their language the author can make as many copies as they like and the only real stipulation is that you cannot offer the copies for sale. Under the ACM wording it's not necessarily clear what constitutes a commercial advantage or what constitutes a personal use.
Note that restricting your search to just "may the author email a copy of their own work" might be misleading. My last ACM copyright release specifically provides that I may:
(iii) Post the Accepted Version of the Work on (1) the Author's home
page, (2) the Owner's institutional repository, or (3) any repository
legally mandated by an agency funding the research on which the Work
Nowhere in this document do they specifically give me the right to email a copy of my work to other people, so whether or not I'm technically allowed to do that is a matter of interpretation of the contract. However, if someone emailed me and asked for a copy I could 100% satisfy that person by providing a link where they could download it from my website rather than email them directly, and I 100% stay within the actions specifically allowed by the contract.
The IEEE has an exactly analogous statement about distributing through personal webservers.