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Its been a while - but hope these tips help: Make sure you greenlight the IP address of your server for smtp relay. Sometimes your webhost will block outgoing smtp ports to servers other than their own. Ask your host to remove this limitation, if they do not, find another host. This is common with shared hosting. There are issues with Gsuite smtp relat long ...


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It seems there is a difference between sending via Gsuite and Gsuite SMTP Relay ... For sending via Gsuite, and comparing the connection details in the post you linked to with a site using this, the difference is that it uses SMTP host ssl://smtp.gmail.com The main practical limitations are the limits and that all mails get sent out with the sender of the ...


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Civicrm has changed how it's including the PEAR library - it was previously including a patched version - however this was updated in https://github.com/civicrm/civicrm-core/commit/a6a0ff13d2a155ad962529595dceaef728116f96# to improve maintainability I believe if you want to apply the fix from SMTP connection failing problem you will now find the required ...


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The invalid sender address in the messages suggests that you have not set up your CiviMail -> Mail Accounts bounce account with a proper domain - that sender would normally have that domain after the @ sign.


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If the same credentials work on one server and not another, there's a good chance that you have php-mcrypt installed on one and not the other. When php-mcrypt is installed, CiviCRM encrypts the SMTP password, and assumes that any passwords are encrypted. This can be a problem if your PHP environment changed (in particular, php-mcrypt is deprecated and it's ...


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I'm working with a site that has used MailJet via SMTP for a number of years. I'm not aware of any issues of using it in that way.


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See the 'Support for Plus Addressing in Office 365' roadmap item for Exchange Online... due July 2020 "Plus Addressing is a great way to quickly create custom (or disposable) email addresses based off your standard email address, by simply adding a "+" suffix string to an existing email address in Office 365. For example, a plus address for kimakers@contoso....


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