最大长度 reply-to header
Maximum length of reply-to header
reply-to header 字段是否有最大长度？ e-mail 地址的最大长度已定义，但在 reply-to 中您可以添加多个地址。
关于最新的 RFC 5322 文档
2.2.3. Long Header Fields
Each header field is logically a single line of characters
comprising the field name, the colon, and the field body. For
convenience however, and to deal with the 998/78 character
limitations per line, the field body portion of a header field can
be split into a multiple-line representation; this is called
"folding". The general rule is that wherever this specification
allows for folding white space (not simply WSP characters), a CRLF
may be inserted before any WSP.
reply-to header 字段是否有最大长度？ e-mail 地址的最大长度已定义，但在 reply-to 中您可以添加多个地址。
关于最新的 RFC 5322 文档
2.2.3. Long Header Fields
Each header field is logically a single line of characters comprising the field name, the colon, and the field body. For convenience however, and to deal with the 998/78 character limitations per line, the field body portion of a header field can be split into a multiple-line representation; this is called "folding". The general rule is that wherever this specification allows for folding white space (not simply WSP characters), a CRLF may be inserted before any WSP.