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Sendmail migration help

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Operating Systems Linux Red Hat Sendmail migration help
# 1  
Old 03-15-2017
Sendmail migration help
I am currently trying to move away from an old email server to Google mail for business. As email is critical for everyone in the company we are trying to do it gradually to minimise the risk of emails getting lost or something going wrong.



Our existing email server uses sendmail 8.13.8 as the MTA. We also have MX records for the domain pointing to this old email server. We have a google mail inbox but it currently receives nothing as there aren't any MX records pointing at it.



We are hoping to set up some sort of forwarding system so that our users can be migrated gradually. The idea would be that when someone sends a user an email, the mail server would either deliver it locally (as it currently does) or forward it to the google mail server (that has no MX record) to be delivered there depending on whether the user has been flagged for migration. We could then gradually test the system with a few users and give them a chance to copy their existing mailboxes over to the new storage before we finally switch the MX record over to Google.


Does anyone have any idea if this is possible and how to go about doing it?
If anyone has any better ideas about doing this migration I'd also love to hear them.


Thanks in advance!
James
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LEARN ABOUT MOJAVE

curlopt_mail_from

CURLOPT_MAIL_FROM(3)					     curl_easy_setopt options					      CURLOPT_MAIL_FROM(3)

NAME

       CURLOPT_MAIL_FROM - SMTP sender address

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAIL_FROM, char *from);

DESCRIPTION

       Pass  a	pointer to a zero terminated string as parameter. This should be used to specify the sender's email address when sending SMTP mail
       with libcurl.

       An originator email address should be specified with angled brackets (<>) around it, which if not specified will be added automatically.

       If this parameter is not specified then an empty address will be sent to the mail server which may cause the email to be rejected.

       The application does not have to keep the string around after setting this option.

DEFAULT

       blank

PROTOCOLS

       SMTP

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.20.0

RETURN VALUE

       Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO

       CURLOPT_MAIL_RCPT(3), CURLOPT_MAIL_AUTH(3),

libcurl 7.54.0							 December 21, 2016					      CURLOPT_MAIL_FROM(3)