sendmail secondary server routing to alternate port

Derrick Ryalls ryallsd at
Tue Aug 19 19:01:51 UTC 2008

On Tue, Aug 19, 2008 at 10:56 AM, Chuck Swiger <cswiger at> wrote:
> On Aug 19, 2008, at 10:16 AM, Derrick Ryalls wrote:
>> For example, if I was relaying for on port 2345, I would
>> specify
>> and that is the port it would use to talk to
>> Now that I have switched to sendmail, I don't see a way to set the
>> destination port on a per domain basis, only on an all or nothing
>> basis.  Am I missing some piece of the documentation or is this an
>> actual limitation of sendmail?
> You can do this with /etc/mail/mailertable:
> ...and change to the relay mailer flags with this in your
>  define(`RELAY_MAILER_ARGS', `TCP $h 2345')
> Note that you might want to define a new mailer called "relay2345" instead
> of changing the default relay mailer.
> Regards,
> --
> -Chuck

Thanks for the tip.  I have added this to .mc:

dnl alternate relay port
relay_port_587,         P=[IPC], F=mDFMuXa, S=EnvFromSMTP/HdrFromSMTP,
R=EnvToSMTP, E=\r
\n, L=990,
                A=TCP $h 587

Created a mailer table:

And when I send to this domain, I get this in the maillog:

NOQUEUE: SYSERR(root): /etc/mail/ line 1718: unknown
configuration line "relay_port_587,         P=[IPC], F=mDFMuXa,
S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\\r"
Aug 19 11:56:50 rncserver sm-mta[70987]: NOQUEUE: SYSERR(root):
/etc/mail/ line 1721: unknown configuration line "\\n,
L=990,\n                T=DNS/RFC822/SMTP,\n                A=TCP
\001h 587"

Guess I have messed something up here, see anything obvious?

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