#761 ✓fixreleased
Johanna Amann

Make hostname in SMTP ehlo configurable

Reported by Johanna Amann | May 8th, 2014 @ 01:33 PM

Hi,

at the moment MailMate either sends the current hostname (or the IP address when not being able to look that up) as the hostname in the ehlo.

While I know this is good style, would it be possible to make this value configureable, or use lo0 as the outgoing device when connecting to localhost?

Background: I have a number of different accounts with differing smtp servers. For security, some of them are just reachable in the network of their institution. I have a local ssh port forward running that forwards the connection port 25 of my submission smtp server. Hence, the smtp server does not actually know my IP address. However MailMate sends it in the ehlo where it is used by the server.

Hence, when using MailMate at the moment the header received lines look like
Received: from my.real.public.hostname (my.work.server [workserver.ip]) by ...
vs (apple mail, which uses the loopback interface to connect to localhost):
Received: from IPv6:::1 by ...

It would be great to be able to choose this value and I suspect it is a really simple change. I just do not want to advertise my current location in every mail I send if it is not absolutely necessary.

Comments and changes to this ticket

  • benny

    benny May 9th, 2014 @ 12:56 PM

    • State changed from “new” to “fixcommitted”

    I'm actually not quite sure what the best behavior would be. I've tried to follow the standards, but I'm not sure it really does any good to use a meaningful IP address in the EHLO anymore. Especially not when most SMTP servers already require authentication before allowing a user to send messages.

    For now I've added the following hidden preference (untested though):

    defaults write com.freron.MailMate MmSMTPFixedIP -string "127.0.0.1"
    

    Note that [] should not be included.

    I've closed the ticket, but if anyone has an opinion (references) on the subject of default behavior then they are welcome.

  • benny

    benny October 15th, 2014 @ 03:32 PM

    • State changed from “fixcommitted” to “fixreleased”
  • benny

    benny October 27th, 2016 @ 01:25 PM

    Here you go:

    defaults write com.freron.MailMate MmSMTPFixedHostname -string "example.com"
    

    This takes precedence over MmSMTPFixedIP (and it could replace it by manually adding [...]). I didn't want to add IPv4/IPv6 address recognition if I didn't have to.

    It's not released yet, but it should work in r5293+.

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