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Add option to convert CRLF to LF line endings for sendmail (#18075)

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It appears that several versions of sendmail require that the mail is sent to them with
LF line endings instead of CRLF endings - which of course they will then convert back
to CRLF line endings to comply with the SMTP standard.

This PR adds another setting SENDMAIL_CONVERT_CRLF which will pass the message writer
through a filter. This will filter out and convert CRLFs to LFs before writing them
out to sendmail.

Fix #18024

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2022-01-06 00:43:45 +00:00 • committed by GitHub
parent bf7b083cfe
commit 1514e13bb8
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4 changed files with 20 additions and 7 deletions
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12
modules/setting/mailer.go
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@ -37,9 +37,10 @@ type Mailer struct {
IsTLSEnabled bool
// Sendmail sender
SendmailPath string
SendmailArgs []string
SendmailTimeout time.Duration
SendmailPath string
SendmailArgs []string
SendmailTimeout time.Duration
SendmailConvertCRLF bool
}
var (
@ -71,8 +72,9 @@ func newMailService() {
IsTLSEnabled: sec.Key("IS_TLS_ENABLED").MustBool(),
SubjectPrefix: sec.Key("SUBJECT_PREFIX").MustString(""),
SendmailPath: sec.Key("SENDMAIL_PATH").MustString("sendmail"),
SendmailTimeout: sec.Key("SENDMAIL_TIMEOUT").MustDuration(5 * time.Minute),
SendmailPath: sec.Key("SENDMAIL_PATH").MustString("sendmail"),
SendmailTimeout: sec.Key("SENDMAIL_TIMEOUT").MustDuration(5 * time.Minute),
SendmailConvertCRLF: sec.Key("SENDMAIL_CONVERT_CRLF").MustBool(true),
}
MailService.From = sec.Key("FROM").MustString(MailService.User)
MailService.EnvelopeFrom = sec.Key("ENVELOPE_FROM").MustString("")