http://www.faqs.org/rfcs/rfc821.html (1982)
Section 4.2.1. https://www.ietf.org/rfc/rfc2821.txt (2001) Section 4.2.1 defines the groups, and 4.2.2.x defines specific codes. https://www.rfc-editor.org/rfc/rfc2487.txt (1999) Secure SMTP over TLS. On Thu, Jan 30, 2014 at 3:19 AM, STeve Andre' <and...@msu.edu> wrote: > So far, I'm not finding them. I'm interested in learning more > about "150 IO error" and "442 i/o error 5", but a general list > of them would be good. I know I'm missing something... > > Thanks, STeve Andre'
