UiPath-ADAv1 Excel and Email Automation Practice Question
Exhibit
EXHIBIT: SMTP Message Settings: - Server: smtp.office365.com - Port: 587 - EnableSSL: True - Timeout: 5000 ERROR LOG: System.Net.Mail.SmtpException: The operation has timed out.
Refer to the exhibit. The automation fails to send an email with a 20MB attachment. Which is the most likely cause and solution?
⚠ Common exam trap
Candidates often assume timeout errors on large attachments are caused by network connectivity loss, ignoring that default timeout limits are simply too short.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the Timeout property in the activity properties.
The 'Operation has timed out' error in SMTP usually indicates that the attachment size exceeds the server's threshold or that the network latency prevents the upload within the defined 5000ms timeout window. Increasing the Timeout property in the Send SMTP Mail Message activity allows more time for the server to acknowledge the transmission of large files, which is necessary when working with substantial email attachments in enterprise mail environments.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the Port to 25 and set EnableSSL to False.
Why it's wrong here
Port 25 is typically blocked by modern security policies and is not encrypted. Disabling SSL on a modern SMTP server like Office 365 will cause the connection to be rejected immediately by the server, resulting in an authentication error rather than a timeout during the transmission process.
- ✓
Increase the Timeout property in the activity properties.
Why this is correct
Large attachments require more transmission time. If the server takes longer than the configured timeout to process the email and send an acknowledgement, the robot throws a timeout exception. Increasing this value gives the network stack sufficient time to complete the transfer of the 20MB file.
- ✗
The server address is incorrect and should be set to pop.outlook.com.
Why it's wrong here
POP is a protocol used for receiving emails, not sending them. Sending emails requires an SMTP protocol address. Changing the server to a POP address would result in a connection failure or an 'invalid protocol' error, not a timeout occurring specifically during the attachment upload process.
- ✗
The error is caused by an invalid sender email address format.
Why it's wrong here
An invalid sender address format would trigger a '550' or 'Sender rejected' error from the SMTP server immediately upon submission. It would not cause a timeout error, which is specifically related to the network latency or the time taken to upload the payload of the message.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official UiPath exam blueprint
This UiPath-ADAv1 practice question is part of Courseiva's free UiPath certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the UiPath-ADAv1 exam.