IMAP_SSL_CERT(7) - Linux man page online | Overview, conventions, and miscellany

Connects to an IMAP server using SSL and saves the server certificate into a .pem file.

IMAP_SSL_CERT(7) User Contributed Perl Documentation IMAP_SSL_CERT(7)


imap_ssl_cert - connects to an IMAP server using SSL and saves the server certificate into a .pem file


imap_ssl_cert -H > server_ca_file.pem imap_ssl_cert -? imap_ssl_cert --help


This utility requires the following perl modules to be installed: Getopt::Long Mail::IMAPClient IO::Socket::SSL Net::SSLeay


--timeout <seconds> Abort with critical status if it takes longer than <seconds> to connect to the IMAP server. Default is 60 seconds. The difference between timeout and critical is that, with the default settings, if it takes 45 seconds to connect to the server then the connection will succeed but the plugin will return CRITICAL because it took longer than 30 seconds. Also known as: -t <seconds> --hostname <server> Address or name of the IMAP server. Examples:, localhost, Also known as: -H <server> --port <number> Service port on the IMAP server. Default is 143. If you use SSL, default is 993. Also known as: -p <number> --verbose Display additional information. Useful for troubleshooting. Also known as: -v --version Display plugin version and exit. Also known as: -V --help Display this documentation and exit. Also known as: -h --usage Display a short usage instruction and exit.


Print the server's SSL certificate chain $ perl -H > ca_file.pem $ cat ca_file.pem -----BEGIN CERTIFICATE----- MIID1zCCAr+gAwIBAgIQPr3bVk0SkuXygjxgA7EVGDANBgkqhkiG9w0BAQUFADA8 [...snip...] 0FF4warjskrfqaVtWeIV58LJheaM4cPJkc2M -----END CERTIFICATE----- $ openssl x509 -in ca_file.pem -text



Fri Nov 11 03:38:13 AST 2011 + version 0.1


Jonathan Buhacoff <>
Copyright (C) 2011 Jonathan Buhacoff This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <>.
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