autoconfig autodiscover port number

Is there a way to change the default SMTP port number for autoconfig and autodiscover requests? Currently it sends 465 but I need it to send 587.

I can't find any documentation on the cgi scripts themselves. Is the source code for these scripts located somewhere on the server, github or simply proprietary?

 

I changed the port number just now with no effect. I checked the enabled box but not the monitor. I set the field to 587 only. I did not add any other ports separated by commas.

Sending a POST request with XML data is what I used to test it.

Code:

https://<!-- Host Address -->/autodiscover/autodiscover.xml

Code:

<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
    <Request>
        <EMailAddress><!-- Email Address --></EMailAddress>
        <AcceptableResponseSchema>http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a</AcceptableResponseSchema>
    </Request>
</Autodiscover>

I got this response.

Code:

<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
    <Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
        <User>
            <DisplayName><!-- Email Address --></DisplayName>
        </User>
        <Account>
            <AccountType>email</AccountType>
            <Action>settings</Action>
            <Protocol>
                <Type>IMAP</Type>
                <Server><!-- Host Address --></Server>
                <Port>993</Port>
                <DomainRequired>off</DomainRequired>
                <SPA>off</SPA>
                <SSL>on</SSL>
                <AuthRequired>on</AuthRequired>
                <LoginName><!-- Email Address --></LoginName>
            </Protocol>
            <Protocol>
                <Type>SMTP</Type>
                <Server><!-- Email Address --></Server>
                <Port>465</Port>
                <DomainRequired>off</DomainRequired>
                <SPA>off</SPA>
                <SSL>on</SSL>
                <AuthRequired>on</AuthRequired>
                <LoginName><!-- Email Address --></LoginName>
            </Protocol>
        </Account>
    </Response>
</Autodiscover>

 

Yes. We don't use port 465 and 587 has been in use for some time now. As part of a PCI compliance process we disabled TLS on connect by setting it to port 466 in Exim's advanced configuration.

The standard port number for submission is 587 and 465 has been deprecated for quite a while now.

tools.ietf.org/html/rfc6409

tools.ietf.org/html/rfc2487

en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol#Ports

 

Have you determined anything in regards to this issue?