Change Amazon port form 2587 to 587

[LevryKurniawan]

Q	A
Branch?	3.1
Bug fix?	yes
New feature?	no
Deprecations?	no
BC breaks?	no
Automated tests included?	no
Issue(s) addressed	Fixes #9212

Description:

This was changed from 587 to 2587 by #3857.
But due to the above issue and Google Cloud has also open port 587, I think it is necessary to bring it back to 587.

Steps to test this PR:

1. Load up this PR

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[RCheesley]

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[mabumusa1]

This change will break the integration, SES SMTP defaults to the port 2587 and webhooks coming back from SNS are request back to HTTP or HTTPS ports.

I think this PR is not relevant to the issue described

[RCheesley]

Hi @LevryKurniawan and thanks for taking the time to make this PR.

Generally speaking, the reason why the port you initially tried to use will not work is because your firewall is blocking it at the server level. The appropriate course of action would be to open the port so that you are able to connect on the default port.

As this is a server configuration issue we would not look to introduce this proposed change, so I will close this PR down.