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add pedantic mode (used by localserve) that refuses some behaviour that is invalid according to specifications and that we normally accept for compatibility

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This commit is contained in:
Mechiel Lukkien
2023-03-12 15:16:01 +01:00
parent 132f08913b
commit 317dc78397
16 changed files with 127 additions and 56 deletions
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7
smtpserver/server.go
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@ -284,8 +284,6 @@ type conn struct {
ncmds int // Number of commands processed. Used to abort connection when first incoming command is unknown/invalid.
dnsBLs []dns.Domain
// todo future: add a flag for "pedantic" mode, causing us to be strict. e.g. interpreting some SHOULD as MUST. ../rfc/5321:4076
// If non-zero, taken into account during Read and Write. Set while processing DATA
// command, we don't want the entire delivery to take too long.
deadline time.Time
@ -1509,8 +1507,9 @@ func (c *conn) cmdData(p *parser) {
// ../rfc/6409:541
xsmtpUserErrorf(smtp.C554TransactionFailed, smtp.SeMsg6Other0, "message requires both header and body section")
}
// todo: check disabled because ios mail will attempt to send smtputf8 with non-ascii in message from localpart without using 8bitmime. we should have a non-lax mode that disallows this behaviour.
if false && msgWriter.Has8bit && !c.has8bitmime {
// Check only for pedantic mode because ios mail will attempt to send smtputf8 with
// non-ascii in message from localpart without using 8bitmime.
if moxvar.Pedantic && msgWriter.Has8bit && !c.has8bitmime {
// ../rfc/5321:906
xsmtpUserErrorf(smtp.C500BadSyntax, smtp.SeMsg6Other0, "message with non-us-ascii requires 8bitmime extension")
}