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#1 Re: Feature requests & improvements » Office365 SMTP Support » 2021-05-26 18:08:34

Blyzard

I agree with you, and it's a shame that Microsoft didn't managed to respect this RFC.

I also don't recommand that things must be changed in some fancy way in order to work, as you stated the RFC was made in order to make this works everywhere if it's respected.

My final thought of this is RFC compliance VS the service provider size and usage, assuming that fixing the "faulty" part is not something cumbersome...

If it was my own full environment, i may have used other email service provider, providing a different subdomain and MX entries in DNS in order to use an other "managed" mail service that is RFC compliant instead.

Thank you for your work and your infos.

Where is the helper located for the change ?
Is this available in the last XSIBackup-DC build ?

Thank you !

Have a nice day.

#2 Re: Feature requests & improvements » Office365 SMTP Support » 2021-05-18 08:49:52

Blyzard

Indeed, it seem that for some reasons, Microsoft Office 365 does not respect the RFC.
It is still the only solution i have found to send emails to Office 365 SMTP servers.

This is the email provider of my business client, i don't have the choice to change.
Thanks for your additional informations.

Have a nice day

#3 Feature requests & improvements » Office365 SMTP Support » 2021-05-17 10:01:25

Blyzard
Replies: 6

Hi,

I don't know exactly if this should be posted around this forum section "Feature requests & Improvements" or somewhere else.
But at least, i have some interesting bits about the Office 365 support.

I was having some issues sending emails from XSIBackup-DC to an Office 365 SMTP server.
The errors message were:

501 5.5.4 Invalid domain name [PAYP264CA0002.FRAP264.PROD.OUTLOOK.COM]
501 5.5.4 Invalid domain name [PAYP264CA0002.FRAP264.PROD.OUTLOOK.COM]
503 5.5.2 Send hello first [PAYP264CA0002.FRAP264.PROD.OUTLOOK.COM]

In case you would be interested as an upgrade or simply a note in your documentation, here are the changes i have made to make it work:

- Office 365 can be extremely picky on EHLO. You have some insights on Microsoft 365 EHLO issues here.

- So i opened the XSIBackup-DC installation path, and in ./etc/sendmail, i first made a backup of the file, then on line 424, changed the command:

echo -ne "ehlo ${HOSTNAME}${nl}"

to

echo -ne "ehlo${nl}"

- Also to mention that i used TLS as protocol. My configuration look like this in ./etc/smtpsrvs.conf:

1;smtp.office365.com:587;backup@mydomain.domain;backup@mydomain.domain;MyPassword;yes;TLS;0

Of course the email domain and password are anonymized in this example !

Then everything worked fine.
By using ./xsibackup --smtp-test , i now receive the test email !

Regards.

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