“The error message returned to us by the smtp server of one (or more) recipients, indicates the nature of the problem 550 Message rejected due to content restrictions This error message indicates that the body of the email we sent contains something that is not allowed on the recipient’s network, due to security settings on that specific network. The most frequent causes are: 1) Attachments to the email in a format that is not allowed. Ex: .exe or .eml files, sometimes also .doc, .xls files, etc. This often occurs on company networks with security restrictions against the spread of viruses, and in this case it is resolved by sending the attachment contained in a .zip or .rar archive or by completely removing the attachment. 2) In other cases, the content of the text or signature may be interpreted as spam and therefore cause the email to be blocked. In this case, try sending the same email so that it does not contain any links or inclusion of code and external images or videos, or videos or images inserted within the text. LineaHosting hosting plansallow, through the Cpanel control panel, to set whitelists, or lists of domains or individual email addresses of our trusted contacts, which must in no case be filtered or rejected.”

“If the domain associated with the hosting plan is active, you must first check if you can view your site and access your e-mail. If the domain associated with the hosting plan has not yet been registered or transferred, you must remember to temporarily use CPanel access via IP address (specified in the service activation email) If the username and password are requested but they are not accepted , it means that they are not typed correctly, respecting the upper and lower case letters included, or that you are not specifying the correct username or password. If, on the other hand , no username / password is requested but the browser generates an error page or in any case a blank page or does not load any page , etc. means that there may be a block on your LAN or connection of one of these network ports: 2082 cPanel TCP inbound 2083 cPanel (https) TCP inbound 2086 WHM TCP inbound 2087 WHM (https) TCP inbound 2095 Webmail TCP inbound 2096 Webmail ( https) inbound TCP which are those used to access the CPanel and WHM services, which are the control panels provided by LineaHosting with all Hosting packages In the latter case, if the connection takes place within a company LAN, it is possible that there are policies that prevent the connection to these TCP / IP ports, which are not normally used for normal browsing on the Internet and therefore could have been blocked by the network administrator. You should then contact your network administrator for appropriate checks and changes. If, on the other hand, you are unable to access any of the services or you are certain that there are no filters of this type on your LAN, on your computer (including personal firewalls installed on the PC) or on your internet connection (firewall on router), we invite you to open a report via Ticket in our Customer Area, to allow us to carry out a verification.”

“The ID SHIELD service allows the holder of a domain to be made anonymous to a WHOIS search within a publicly accessible database containing all the data of all registered domains. The domain is registered in the name of an intermediary company based offshore and any incoming e-mail is redirected to the real e-mail contact of the holder. The service is extremely useful when you want to disguise the owner of a domain, it being understood that its use must be legal and that the service DOES NOT guarantee any type of anonymity for any violations of the domain regulations and / or for international offenses. . LineaHosting provides the ID Shield service as an option(at other providers it is called WHOIS Protect ) only for some types of domain, with a low annual cost. We remind you that for .IT domains, it is possible (free of charge) to prevent personal data from being published in the WHOIS db, but it is not possible to mask the admin contact (name and surname) and the ID Shield service is not applicable.”

“In this brief and hopefully useful document, we have drawn up a list of the most common precautions and rules with respect to a delicate issue such as that of IT security. It is not a manual, nor an exhaustive list of possible protections against attacks by hackers, spammers, etc., or basic for compliance with a DPS (Programmatic Security Document) but simply a VADEMECUM that also allows the less experienced site administrator to avoid the most common distractions and mistakes when using a hosting service. Of course we are totally open to suggestions on how to improve or expand this document: Many of these rules will seem elementary to most and in any case already complied with by the current IT security and privacy regulations, but we have decided to do something useful to summarize them here: 1) E-MAIL With all hosting plans, access to a mail server is usually provided, which allows both the receipt of e-mail (via POP3 connection or webmail) and the sending of mail via SMTP (or webmail) . a single pre-existing mailbox is created and then the possibility of managing their own mailboxes is left to the initiative of the Customer through the control panel supplied with the service, it is useful to remember a few basic rules on the configuration of mailboxes: a) passwords must be composed of at least 8 alphanumeric characters, possibly both letters and numbers, and should not contain words already present in the email address nor in any way be attributable to the person using the mailbox (NO name , NO surname) or to the work he carries out (e.g. company name). Likewise, they should not contain commonly used names, especially city names or proper names. In general, the characters used in mail passwords should be RANDOM, which is a random sequence of letters and numbers, including capital letters and special characters (exclamation point, etc.). The use of the Cpanel password generator, present on each page where the passwords for accessing the services are set, b) passwords should not be written down on any unencrypted document that is present on your hard disk, and especially not all collected in a single, clearly identifiable file. For the secure management of your passwords, LineaHosting recommends KeePass , available for various operating systems including smartphones. c) In the case of companies with more employees and therefore more mailboxes, each mailbox should have its own password NOT COMMON to the other mailboxes and known only by the owner of the mailbox itself, and / or at most by a person identified as the technical manager who has them in custody. These rules are also provided for by the requirements of Privacy in the workplace, as well as by the common rules for the correct management of a company network. d) An updated antivirus system with Browser monitoring and Email monitoring functions (eg: Kaspersky Internet Security) should always be present and functioning on each computer connected to the Internet, in order to prevent the installation and spread of computer viruses via e-mail or via browsing compromised websites. e) Whenever possible, use POP3s, IMAPs or SMTPs connections, with the STARTTLS authentication method. This protocol allows the data exchanged between servers and mail clients, including passwords, to be encrypted and therefore more difficult to intercept in the event of a security compromise on the same corporate LAN on which this information transits. Within the control panel assigned to each hosting plan, all the configurations for these access modes are detailed. 2) PASSWORD STORAGE The access passwords of any service installed on your domain should be kept in a safe place, possibly in print or in an encrypted file. Keeping passwords in a single plain text file is very risky as, if found or “”stolen”” by a computer virus, it would allow you to know all the accesses to all services in one fell swoop. There are good mobile programs and apps that can store all your passwords and encrypt them securely. 3) SCRIPTS PHP, CGI One of the most used methods by hackers to gain illegal access to an information system and in this case to a server, is to exploit security holes in the system itself. In the case of servers used for hosting websites, the “”easiest”” way for the hacker is to study and then violate the software installed within the document root and not adequately protected or tested against any use other than that planned. The best known techniques of this type of attack are called “”exploits”” (they can be remote or local, depending on whether they are brought directly from a remote server or require local access in advance). The topic is too long and complex to be addressed in a few lines here, however it may be sufficient to keep in mind a few rules: a) any commercial script purchased and then installed on an account MUST be constantly updated to the latest version made available by the developers. This serves to correct not only the bugs of the program itself, but often also the security flaws identified by the creators of that software! b) The same rule also applies to software / scripts distributed free of charge. Some of the most famous scripts are particularly targeted: – PhpBB, WordPress, Joomla, etc. It is important that these scripts, if installed in your web space, are always updated by the Customer to the latest version available, especially in the presence of security updates. On average, each year, each of these software receives at least 5-10 updates, of which at least a part concerns updates to cover security flaws, sometimes even very serious and easily exploited by aspiring hackers with modest skills. Maintaining obsolete and vulnerable versions puts the entire account (and sometimes other customers on the same server) in serious risk of compromise, illegal use and whatever worse you can imagine. For this reason, it is in the interest of each account holder to ensure that this correct maintenance is carried out over time, even if this can have a significant cost in economic terms. 4) FORM MAIL: from the form on the site to your email IN SECURITY Another separate chapter is dedicated to the use of scripts that allow you to send an email from a web page directly to a mailbox. A separate chapter was dedicated to this delicate topic and on which depends the ability to fight a spammer who wants to use your site to send tens of thousands of emails anonymously! The article is present in our FAQ. 5) FTP ACCESS The same rules already described in point 1) apply to emails, regarding the password and its conservation. 6) MAINTAINING A COPY OF THE SITE ON YOUR HARD DISK Although all our servers have backup units which are carried out in the manner provided for in the contract, at no additional cost, it is absolutely recommended that everyone keep a local copy of all files, so that in the unfortunate case of compromise or loss of data there is always a copy physically located in another place and on another hardware / network system. For those sites with a high update frequency such as dynamic sites, communities, etc. LineaHosting provides dedicated Professional Hosting and / or Remote Backup solutions , which provide an adequate level of data replication. 7) DO NOT ABANDON YOUR SITE Even if it is a service that you use only occasionally, it is always good to do a quick check of the sites from time to time to check that the data and contents correspond to what you would expect to find. In the event of a long absence and the impossibility of managing your site, it is advisable to appoint someone on your behalf and / or communicate to us the changes in address in case of urgency. Whenever possible, don’t use autoresponders! This is because autoresponders also send a response to all spam emails that have not been eliminated by spam filters, generating useless and potentially harmful traffic that adds more spam. 8) KEEP YOUR CONTACTS UP TO DATE LineaHosting staff uses the main email contact you provided when signing up for the service. This email should be checked at least once a day or in any case with a certain frequency, or entrusted to an expert and trustworthy person who is able to deal with it. In this way you will be able to promptly receive any updates, requests, urgent communications, etc. In the same way, any changes relating to telephone numbers, addresses, etc. should be updated in the Customer Area. 9) CONSULT THIS HELPDESK In addition to the sections that everyone knows about opening assistance tickets, many do not know that the other sections contain many articles, constantly updated, about the use of our services and the answer to the most common problems. These articles can often save a lot of time in finding useful information. 10) DOUBTS? CONTACT TECHNICAL SUPPORT If a software, a script does not convince you, if you need advice on a security aspect or on the correct use of the hosting service, asking is much better than taking a risk! Our Technical Support 24 hours a day via Live Chat and Ticket will be happy to provide you with all the explanations or indications on where and how to find the documentation to be correctly informed.”

“Below we illustrate the guidelines valid for LineaHosting for any mass mailing or direct email marketing activity, but which can be considered valid in order to correctly manage a mailing list with any hosting service. These Guidelines are based in part on commonly adopted international standards and in part on our decades of experience, with the aim of guaranteeing an excellent delivery rate of messages sent and at the same time minimizing the risks of this activity being interpreted as SPAM by part of the Networks and servers receiving the messages, with the particularly damaging consequences of this eventuality. 1) Use specific software (standalone or to be installed on server) for the management of Newsletter and Mailing list, using the smtp server supplied with our services or sendmail in the case of software installed on the server. Many CMSs provide modules or plugins for the advanced management of newsletters and mailing lists, but alternatively there are specific software (eg: PHPList). 2) If the email uses the SMTP (outbound) of a server on the LineaHosting network, set a sending interval NEVER higher than 60 emails per minute and 500 emails per hour ( 100 / hin the case of Personal Line packages). Exceeding this limit is not allowed because it can exponentially increase the risk of obtaining a higher bounce rate and / or causing the block (ban) by Networks particularly susceptible to spam traffic, such as MSN / Hotmail or Gmail , with effects that would also be extremely harmful for other domains of other Clients hosted on the same server! Mass sending activities must be scheduled preferably in the evening or even better at nightor early in the morning, when the server’s smtp activity is lower than the time zone in which you reside. Most software allows you to configure both the sending time and the sending frequency. The ideal interval that optimizes delivery rates is 20-25 emails every 3 minutes. Sending quantities exceeding these limits require the use of external services specifically designed for high outbound smtp traffic, therefore it is recommended to contact our assistance. 3) On our shared hosting plans, the maximum acceptable sending frequency using the internal SMTP is daily with a user not exceeding 1,500 unitstherefore only suitable for small mailing lists. In the Resellers and VPS hosting plans, the sum of daily massive emails sent cannot exceed 5,000 emails. On Dedicated Server it is advisable to contact us to determine the most suitable strategy, in the case of bulk mailings in higher quantities. 4) Absolutely to avoid sending attachments in a mailing list, to avoid a strong increase in errors and timeouts in sending. If documents are to be made available, these should be uploaded to a specific folder within your web space and then made available for download via a link specified in the Newsletter. 5) Each email must contain only one recipient. It is of fundamental importance NOT to group multiple contacts in a single email, even if in blind copy (Bcc), because this is the fastest method if you want our emails to be discarded by the spam filters of the recipients. All Mailing list management software automatically carries out a single sending for each recipient, in addition to the ability to customize parts of text based on the recipient’s data (eg: Name and Surname, etc.), making communication more effective and therefore the possibility that the recipient actually reads the email. Most SMTP servers reject incoming or outgoing emails containing more than 50 recipients, but for greater security it is advisable to use separate or better still individual emails when there are more than 10-15 recipients. 6) If the Newsletters are sent in html format, any element (images included) should be uploaded via a remote path to your account (eg: img src = http: //sito.it/imphotos/ecc.gif) and not attached to the email, to reduce its weight. 7) Naturally, as required by the AUP (Acceptable Use Policies) of LineaHosting and almost all Hosting Providers, the Newsletter must necessarily satisfy the criteria imposed by the anti-spamming measures codified internationally and known as “”opt-in compliance clauses”” “”and”” opt-out “”. This means: – the subscriber must have voluntarily registered for the Newsletteror in any case having given his demonstrable consent. It is recommended to insert a notice at the bottom of the Newsletter reminding the user that he has given his consent to the receipt of this communication (eg by subscribing to a website). If the contact list was not collected directly but was purchased or taken over by a third party company, it is good to ask specifically if the Privacy Policy of this list provides for the possibility of transferring this data: otherwise, your use becomes illegal (and therefore SPAM) if it is not accompanied by a new consent from each recipient. A completely similar argument applies in the event that the list was collected for other purposes – eg: using a list of contacts for billing purposes for communication of offers without having specified consent to send commercial proposals, it is NOT legal. – the subscriber must have the possibility to unsubscribe from the Newsletter through the appropriate link in the Newsletter or in any case in a way that can be easily used even by the less experienced user. It is mandatory to insert a notice at the bottom of the Newsletter indicating how to remove your contact for future communications. Compliance with the opt-in and opt-out clauses (point 7), as well as with the common netiquette practices regarding commercial communications via email, also applies in the event that mass emails are sent via services / SMTP external but with sender or with reference to a domain hosted on a server on the LineaHosting network. These clauses are used to prevent any complaints from third parties or from control bodies (Spam cops) for any phenomenon of indirect spamming (“”Spamdvertising””), which would also entail a penalty for the server hosting the domain of origin. Conditions other than these must be notified in advance and discussed with the Hosting provider, to adopt the most targeted and effective solution, and above all to avoid any type of negative repercussion both on the Client’s services and on those of LineaHosting.”