Gagravarr

Gagravarr has asked 10 questions and find answers to 264 problems.

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Gagravarr questions

Sending emails via Sendgrid failing for some mails - unable to get mx info: failed to get IPs from PTR record: lookup <nil>: unrecognized address

Gagravarr answers

Results address of empty cell in Excel sheet using XSSF
Creating an xssf workbook from an uploaded .xlsx(2007 Excel file)
Setting Password Protection on XSSF Workbook
Use POI to parse Excel but got exception "Invalid Header Signature"
Using POI or Tika to extract text, stream-to-stream without loading the entire file in memory
Read Excel from Apache poi java
How to detect image in a document
Execute .jar from Python
using Apache POI with Android
org.apache.poi.poifs.filesystem.OfficeXmlFileException