# Several Email Questions

**URL:** <https://forum.virtualmin.com/t/several-email-questions/50729>\
**Category:** Virtualmin\
**Created:** [March 24, 2015, 12:22pm UTC](https://forum.virtualmin.com/t/several-email-questions/50729 "2015-03-24T12:22:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Philip\_B](https://cdn.forum.virtualmin.com/user_avatar/forum.virtualmin.com/philip_b/32/1416_2.png) [@Philip\_B](https://forum.virtualmin.com/u/Philip_B)\
**Post date:** [March 24, 2015, 12:22pm UTC](https://forum.virtualmin.com/t/several-email-questions/50729/1 "2015-03-24T12:22:59Z")

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Hi,

Just a couple of postfix questions. Thanks in advance for any replies.

Setup: Centos 7 - minimal install on SSD VPS

1. I noticed, when setting up a second server for DNS and backups that Webmin installs Postfix version 2.6 and my primary server with Virtualmin uses Postfix version 2.10. I re-installed Postfix with yum but the version number remains at version 2.10. Is this something specific to Virtualmin base repo?

2. After many nights of reading I have come to the conclusion that port 587 is only needed for submission when using email clients such as Thunderbird. As I only use Usermin I presume I only need to open Dovecot ports in my firewall - ports 143 and 993 (email is sending and receiving ok from within Virtualmin).

Philip

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**Author:** ![Eric](https://cdn.forum.virtualmin.com/letter_avatar_proxy/v4/letter/e/898d66/32.png) [@Eric](https://forum.virtualmin.com/u/Eric)\
**Post date:** [March 24, 2015, 2:12pm UTC](https://forum.virtualmin.com/t/several-email-questions/50729/2 "2015-03-24T14:12:12Z")

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Howdy,

When running the Virtualmin install.sh script, it installs the Postfix version available to your distro.

In the case you’re seeing there, I suspect that your second server may be running a different distribution than your new CentOS 7 server.

For example, CentOS 6 comes with Postfix 2.6.6, is that perhaps what you’re running there?

Regarding the email ports – if you only use Usermin, you may not need to open any Dovecot-related ports in your firewall. Those ports wouldn’t need to be remotely accessible, they’d just need to be accessible from the server itself – and to do that, you shouldn’t need to tweak the firewall.

-Eric

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**Author:** ![Philip\_B](https://cdn.forum.virtualmin.com/user_avatar/forum.virtualmin.com/philip_b/32/1416_2.png) [@Philip\_B](https://forum.virtualmin.com/u/Philip_B)\
**Post date:** [March 24, 2015, 5:38pm UTC](https://forum.virtualmin.com/t/several-email-questions/50729/3 "2015-03-24T17:38:53Z")

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Thanks Eric, You are correct. I use CentOS 6 on the second server. Thanks for your quick reply and advice.

Philip

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**Author:** ![system](https://cdn.forum.virtualmin.com/uploads/default/original/2X/c/cd96d761e326db4b2bef94886a639109bd7a8e76.svg) [@system](https://forum.virtualmin.com/u/system)\
**Post date:** [April 30, 2020, 6:03am UTC](https://forum.virtualmin.com/t/several-email-questions/50729/4 "2020-04-30T06:03:02Z")

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Closed on April 30, 2020, 6:03am UTC