The ability to empty a users emailbox without deleting the account and recreating would be great.

It would be nice to have an external SMTP (smarthost) ability for a per-domain basis (most mail services have this)

We use this for external scanning, data leak prevention and more.

Can this be be done?

At the moment by default any webmail interface is under domain webmail.<domain>

Some people would like to use custom one. For me personally it's important to have this as server-wide setting (I have basic workaround for this - custom domainWebmail.php), but it isn't perfect (many links to webmail service missing, e.t.c.).

And that's why we have plesk - user friendly interface.

I suggest you add a feature in Settings with which we can enable SPAM / VIRUS protection for newly created mailboxes by default.

Discussion here:

http://forum.parallels.com/showthread.php?287233-Anti-virus-and-anti-spam-enabled-by-default-on-mailbox-creation&p=715980#post715980

Is easy to use.

It would be much better if server-wide and per-mailbox options were available in Plesk to add SpamAssassin rules.

SpamAssassin can be configured by the command line, but this is difficult for many of us.

ActiveSync is a necessary tool for most businesses today as it allows them to have everything in one place and stream it automatically to every device they use. Users with mobile phones and tablets can easily sync their contacts, calendars, notes and emails via activesync and users with outlook and other mail clients can sync contacts, mail and perhaps notes.

Most of RBLS are checking the SMTP Banner and currently only the first domain name is being used. To reduce scamming or to prevent being blacklisted you should apply myhostname with the according domain name.

enable email piping like in cPanel email forwarders to pipe to a script (osticket)

Actually it's possible to show deferred messages headers in : Tools and settings > mail server settings > mail queue

It would be very useful if it's possible to show the reason why the message is deffered or stuck in the queue (/var/spool/postfix/defer).

I want to be able to set the recipient_delimiter. But, currently, any customizations to main.cf get overwritten.

Now you have two opportunities to set the spamfilter - server-wide or individual. It would be very handy if the admin or the customer could set the spamfilter for the whole subscription or/and for the whole domain.

Many mail servers have this feature. Please include in plesk possibility to add disclaimer to mail footer on specified domain.

Many Clients ask me how to add Disclaimer to mail footer automatically not from webmail.

I'm not sure if any webmail option right now allows the email user to update their out of office / auto response message. I think the email user has to login to Plesk to be able to edit that right now (which is annoying).

Anyone have any suggestion on this?

Add functionality to import csv files to create multiple e-mail accounts from a list in Plesk Panel

Make SPAM and Virus statistics visible on linux like on windows

For our customers I need to be able to use "smith.domain.com" as their Email Username, as opposed to their email address

If you have several ip-addresses on your server it should be possible to choose a different certificate for each ip address.

extend the webmail settings screen like the php settings.
show the amount and which domain is using which webmail client and allow changes to it.
now after the horde desaster it would be way easier to identify domains using it and changing that.