Expose go-smtp functionality for setting the domain name as a config
option. This allows aerc to communicate with SMTP servers with strict
antispam measures without relying on sendmail.
In theory, this should be set to a fully qualified domain name, but some
servers simply forbid the use of "localhost", so it is reasonable to let
the user set whatever value works for them.
For comparison, this is equivalent to the functionality of the "domain"
option of msmtp.
Signed-off-by: Karel D. Kopecký <kdk@freeshell.de>
---
CHANGELOG.md | 2 ++
commands/compose/send.go | 16 ++++++++++++++--
doc/aerc-smtp.5.scd | 6 ++++++
3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53c1dcb..450465e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
- Add a `msglist_answered` style for answered messages.
- Compose `Format=Flowed` messages with `format-flowed=true` in `aerc.conf`.
- Add a `trimSignature` function to the templating engine.
+- Change local domain name for SMTP with `smtp-domain=example.com` in
+ `aerc.conf`
### Changed
diff --git a/commands/compose/send.go b/commands/compose/send.go
index 4029552..1b65ab0 100644
--- a/commands/compose/send.go
+++ b/commands/compose/send.go
@@ -93,6 +93,10 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
if starttls_, ok := config.Params["smtp-starttls"]; ok {
starttls = starttls_ == "yes"
}
+ var domain string
+ if domain_, ok := config.Params["smtp-domain"]; ok {
+ domain = domain_
+ }
ctx := sendCtx{
uri: uri,
scheme: scheme,
@@ -100,6 +104,7 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
starttls: starttls,
from: config.From,
rcpts: rcpts,
+ domain: domain,
}
warn, err := composer.ShouldWarnAttachment()
@@ -236,6 +241,7 @@ type sendCtx struct {
starttls bool
from *mail.Address
rcpts []*mail.Address
+ domain string
}
func newSendmailSender(ctx sendCtx) (io.WriteCloser, error) {
@@ -393,7 +399,7 @@ func newSmtpSender(ctx sendCtx) (io.WriteCloser, error) {
)
switch ctx.scheme {
case "smtp":
- conn, err = connectSmtp(ctx.starttls, ctx.uri.Host)
+ conn, err = connectSmtp(ctx.starttls, ctx.uri.Host, ctx.domain)
case "smtps":
conn, err = connectSmtps(ctx.uri.Host)
default:
@@ -437,7 +443,7 @@ func newSmtpSender(ctx sendCtx) (io.WriteCloser, error) {
return s.w, nil
}
-func connectSmtp(starttls bool, host string) (*smtp.Client, error) {
+func connectSmtp(starttls bool, host string, domain string) (*smtp.Client, error) {
serverName := host
if !strings.ContainsRune(host, ':') {
host += ":587" // Default to submission port
@@ -448,6 +454,12 @@ func connectSmtp(starttls bool, host string) (*smtp.Client, error) {
if err != nil {
return nil, errors.Wrap(err, "smtp.Dial")
}
+ if domain != "" {
+ err := conn.Hello(domain)
+ if err != nil {
+ return nil, errors.Wrap(err, "Hello")
+ }
+ }
if sup, _ := conn.Extension("STARTTLS"); sup {
if !starttls {
err := errors.New("STARTTLS is supported by this server, " +
diff --git a/doc/aerc-smtp.5.scd b/doc/aerc-smtp.5.scd
index 7583715..850a71b 100644
--- a/doc/aerc-smtp.5.scd
+++ b/doc/aerc-smtp.5.scd
@@ -64,6 +64,12 @@ are available:
Default: _false_
+*smtp-domain* = _<domain>_
+ Local domain name to use in the HELO/EHLO SMTP command. Set this to a fully
+ qualified domain name if the server requires it as an antispam measure.
+
+ Default: _localhost_
+
# SEE ALSO
*aerc*(1) *aerc-accounts*(5)
--
2.39.1
Karel D. Kopecký, Jan 29, 2023 at 23:16:
> Expose go-smtp functionality for setting the domain name as a config
> option. This allows aerc to communicate with SMTP servers with strict
> antispam measures without relying on sendmail.
>
> In theory, this should be set to a fully qualified domain name, but some
> servers simply forbid the use of "localhost", so it is reasonable to let
> the user set whatever value works for them.
>
> For comparison, this is equivalent to the functionality of the "domain"
> option of msmtp.
>
> Signed-off-by: Karel D. Kopecký <kdk@freeshell.de>
Looks good to me :)
Acked-by: Robin Jarry <robin@jarry.cc>
Karel D. Kopecký, Jan 29, 2023 at 23:16:
> Expose go-smtp functionality for setting the domain name as a config
> option. This allows aerc to communicate with SMTP servers with strict
> antispam measures without relying on sendmail.
>
> In theory, this should be set to a fully qualified domain name, but some
> servers simply forbid the use of "localhost", so it is reasonable to let
> the user set whatever value works for them.
>
> For comparison, this is equivalent to the functionality of the "domain"
> option of msmtp.
>
> Signed-off-by: Karel D. Kopecký <kdk@freeshell.de>
> ---
Acked-by: Robin-Jarry <robin@jarry.cc>
Applied. Thanks!
On Fri Feb 3, 2023 at 12:17 AM CET, Robin Jarry wrote:
> Karel D. Kopecký, Jan 29, 2023 at 23:16:
> > Expose go-smtp functionality for setting the domain name as a config
> > option. This allows aerc to communicate with SMTP servers with strict
> > antispam measures without relying on sendmail.
> >
> > In theory, this should be set to a fully qualified domain name, but some
> > servers simply forbid the use of "localhost", so it is reasonable to let
> > the user set whatever value works for them.
> >
> > For comparison, this is equivalent to the functionality of the "domain"
> > option of msmtp.
> >
> > Signed-off-by: Karel D. Kopecký <kdk@freeshell.de>
> > ---
>
> Acked-by: Robin-Jarry <robin@jarry.cc>
>
> Applied. Thanks!