503 valid rcpt command must precede data outlook 2013

Outlook PST files – sometimes the 503 error will occur if you have a corrupt outlook PST (mail archive) file.don’t make the “from” field differ from the email address used in your outgoing mail settings). Sender matching – make sure you’re sending from the same email address that the recipient sees your email coming in as (ie.If you select to have Outlook “remember your password” you won’t have to type it in every time you send an email. In Outlook, browse to Tools > Account Settings > More settings > Advanced and change the outgoing server to ‘Auto.’ Next, browse back to More settings > Outgoing server and check the “My outgoing server uses the same authentication as my incoming server” box. Server authentication – setup your outgoing mail to use outgoing server authentication (sends mail by logging in with your email address and password).SMTP port – use port 26 (instead of the default 25) for outgoing mail.

In Outlook, browse to Tools > Account Setting > More settings > Advanced > uncheck “leave a copy of this message on the server.” You can uncheck the following option to make sure a copy of all your emails is not being left on the server (note that since the email will be downloaded to your PC after this setting change, you won’t be able to access your emails from another location if you do this). Full mailbox – make sure the mailbox of the affected account is not full or has met/ exceeded its quota.Try disconnecting the VPN before sending/ receiving mail. VPN – if your system is trying to connect via a VPN network while you’re sending email, you may get this error.Apostrophes – remove any apostrophes (single quotes) or other non-alphabetic characters from your email account name(s).If these don’t work, or you need more detail on any of these steps, please read the rest of this article, and its comments, for some more in-depth solutions. For those that are tearing their hair out when getting the “503 valid RCPT command must precede DATA” error (we’ll refer to it as simply the 503 error going forwards) when trying to send email, here are some common solutions that will hopefully get you back up and running.

503 valid rcpt command must precede data outlook 2013