Mailenable SMTP is not accessible locally

Refers to:

  • Plesk 11.0 for Windows
  • Plesk 11.5 for Windows
  • Plesk 12.0 for Windows
  • Plesk 12.5 for Windows

Created:

2016-11-16 12:48:41 UTC

Modified:

2016-12-21 19:16:13 UTC

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Mailenable SMTP is not accessible locally

Symptoms

Mails are not getting delivered from the server an got stuck in outbound queue with error:

    Communications Error: Socket connection to alt4.gmail-smtp-in.l.google.com failed (error 10013). The host was either not contactable or it rejected your connection. Socket Family = 23; Host=1234:f8b0:400c:c03::1abcd; Port=25

It may be not possible to connect locally to SMTP port while service is running properly:

C:> telnet 127.0.0.1 25
Connecting To 127.0.0.1...Could not open connection to the host, on port 25: Connect failed

McAfee protection is installed.

Cause

Mcafee Antivirus may block mail delivery. From McAfee Antivirus log:

    Blocked by port blocking rule   C:\\Program Files (x86)\\Parallels\\Plesk\\Mail Servers\\Mail Enable\\Bin64\\MESMTPC.EXE       Anti-virus Standard Protection:Prevent mass mailing worms from sending mail     1.2.3.4:25
Need access

Resolution

Disable Access Protection in Mcafee, it can be done in McAfee:

  1. Double-click Access Protection.
  2. Deselect Enable Access Protection.
  3. Click OK.

Or remove it.

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