Internal helper function for checking the arguments used in get_max_id and get_min_id functions.
check_args_get_max_min_id(imapconf, by, flag, retries)An object of class imapconf generated with
configure_imap and with a mbox item added after a
mailbox selection with select_mailbox.
Which id (MSN or UID) to use when searching for
messages. "MSN" or message squence number is a message's relative
position to the older message in the mailbox. It may change after deleting
or moving messages. For instance, if a message is deleted, message sequence
numbers are reordered to fill the gap. "UID" or unique identifier
is always the same during the life cycle of a message. Default is
"MSN".
A string specifying the flag to be used for filtering messages.
Use flag_options to list the common flags used by IMAP
servers. Default is NULL.
Number of attempts to connect and execute the command. Default
is 2.
NULL if arguments are correct.
Other miscellaneous helper: check_args_add_replace_flags,
check_args_copy_msg,
check_args_delete_msg,
check_args_expunge
Other check args: check_args_add_replace_flags,
check_args_copy_msg,
check_args_custom_search,
check_args_delete_msg,
check_args_expunge,
check_args_fetch_full_msg,
check_args_fetch_msg_header,
check_args_fetch_msg_metadata,
check_args_fetch_msg_text,
check_args_get_attachments,
check_args_list_attachments,
check_args_move_msg,
check_args_remove_flags,
check_args_search_date,
check_args_search_flag,
check_args_search_period,
check_args_search_size,
check_args_search_string,
check_args_search_within